17 ms·

Khan of Khan Academy at TED (video)

492 points by zootar 16y ago

joshu 16y ago
Saw this live. He's amazing.
- MikeCapone 16y ago
  He is. Hero material. I have a feeling we'll be talking about him in decades the way people talk about Feynman now. Making people want to learn and helping them do it is a noble thing.
  - joshu 16y ago
    Yeah. Turns out I live in the town he mentions -- on the street for one of the schools. If I listened hard, I wonder if I could hear paradigms shifting.
- kenjackson 16y ago
  I've seen a lot of TED lecture. But as a parent I think this may have been the most important one I've seen yet. I've used the Khan lectures, but hadn't seenn the vision. It's one of those rare times where I feel like I have seen the future -- and I really like it.
omfut 16y ago
It was a great talk. Future of education. I loved the way Bill interacted with Khan.
- joshbert 16y ago
  He has stated in numerous occasions that his children use Khan Academy's videos. I really admire Sal for what he's doing with global education. He is a big inspiration for anyone looking to change the world. Specially hackers.
- quickpost 16y ago
  Ya, for sure. Bill was as awestruck as the rest of us.
solarmist 16y ago
Over the years I've found lectures less and less useful to attend in person as profs and other presenters post their lectures and powerpoint slides online. I can just watch/read those and get everything I need from those materials, then when I'm in class I can ask much more useful questions and cover the details that really make the difference. I love how the Khan Academy is institutionalizing that idea. I can't see any reason that lectures need to be done in person, but being able to work through sticking points with someone. Now that is valuable. I really do think Sal Khan will revolutionize teaching. At least in the areas this model is applicable.
thenicepostr 16y ago
nice post wb. does he use prezi for his presentations?
- deleted 16y ago
  [deleted]
- sgentle 16y ago
  I too am curious about this. It didn't look like prezi, but it certainly had zooming and embedded live video and some other neat things.
aashpak1 16y ago
I found it very interesting how he applied data-analysis techniques [at time 12:33 in the video] to provide teachers with a better and correct understanding of each student's shortcomings (probably from his insights from his earlier profession on the Wall St.) that will take the student/tutor interaction to a new level!
- solarmist 16y ago
  What I found more interesting was that lack of those tools in current teaching. I can't believe no one's made those kind of analysis tools available to teachers before.
  - kamens 16y ago
    Can't agree with this enough. Every time we make a new chart I think to myself, "Well that wasn't rocket science," and then when we show teachers they go absolutely nuts.
    - snarknet 16y ago
      Maybe I'm just tired, but what do you mean by chart? A personalized one tailored to a student? Edit: Ignore this, read your blog, very insightful.
  - ianl 16y ago
    In a traditional class room its not possible to collect that data in a practical sense. Teachers are already over worked and technology is in short supply. Which is why tools like these are not available, its only possible here because all students are interacting with the khanacademy.org system.
    - piguy314 16y ago
      Low hanging fruit: -Import scantron test data into a database to analyze which questions students got right/wrong (http://www.scantron.com/cognition/faqs.aspx http://www.scantron.com/cognition/faqs.aspx) -Analyze teachers gradebooks (most are already in excel or an LMS) to see which types of assignments students excel/do poorly at. -Provide comprehensive SAT9/STAR/PISA test data to schools for analysis on individual student strengths/weakesses Seems like the problem is not necessarily lack of data... In fact when the freakonomics team applied econometric analysis to large quantities of data already possessed by the Chicago school district they were able to prove cheating on standardized tests (http://www.wikisummaries.org/Freakonomics:_A_Rogue_Economist_Explores_the_Hidden_Side_of_Everything#Chapter_1:_What_Do_Schoolteachers_and_Sumo_Wrestlers_Have_in_Common.3F http://www.wikisummaries.org/Freakonomics:_A_Rogue_Economist...)
runevault 16y ago
Really wonderful reminder of what just one person can set in motion. I could easily see him becoming considered one of the most important people of this century based on what he is doing for education and its globalization.
barkmadley 16y ago
Here is a link because ted.com is just as awesome as youtube.com http://www.ted.com/talks/salman_khan_let_s_use_video_to_reinvent_education.html http://www.ted.com/talks/salman_khan_let_s_use_video_to_rein... Also is the youtube video a strange colour red for anyone else?
- trystero 16y ago
  I can't wait for the subtitles to be uploaded, so that I can share with my friends who can't be bothered to watch something which is not in their language.
solipsist 16y ago
I've heard countless people rave about Salman Khan and his teaching methods - both here and away from HN. The truth is, I had no idea why he and his teachings were such a big deal...until now. I had seen some of his videos before and read some of the articles about the Khan Academy, but had never given them my full attention. To me, it was just another guy with his own teaching methods. But when I see him talk at TED, it makes perfect sense. Not only is he a superb speaker, he gets his points across clearly. Probably the best point of all is this one: "What I do is I assign the lectures for homework and, what used to be homework, I now have the students doing in the classroom." As radical as that may seem, this idea has TONS of potential. Do we really need teachers there in person if they are just lecturing? The real use of being there in person as a teacher is for interacting with the students. What better way to do that than by helping them with the work (i.e. homework) and letting the Khan Academy lecture when little interaction is needed. I am definitely going to hop on the bandwagon now and join everyone else in following Khan while appreciating his pure genius. In fact, the best way to describe him is to combine all the great things people here on HN have to say about him: > He's amazing. (joshu) > I really do think Sal Khan will revolutionize teaching. (solarmist) > Hero material. (MikeCapone) > Future of education. (omfut) > Really wonderful reminder of what just one person can set in motion. (runevault) > Simply amazing that a guy armed only with a tablet and a microphone can have this much impact. (keiferski) > He is a big inspiration for anyone looking to change the world. (omfut) The list could go on forever. And it's not every day you hear people talking about someone and their ideas in such a way like they are now about Khan and the Khan Academy. If people are saying it is amazing, then there's a pretty good chance that it truly is amazing.
- aashpak1 16y ago
  totally agree - making the self-learning part offline and creating more and better (teachers would know exactly where a particular student is having problems understanding) interactions is the best part of his model.
  - solipsist 16y ago
    Yeah, the data from the students' interaction with the video could be sent back to the teachers and end up creating a comprehensive profile of each of the student's understanding on that particular topic. Then, in the classroom, the teacher would be able to walk from student to student (or form groups of students with similar strengths/weaknesses) and provide the help they needed based on their profiles. This help would be the help that relies on direct interaction between the teacher and student.
keiferski 16y ago
Simply amazing that a guy armed only with a tablet and a microphone can have this much impact.
DanielN 16y ago
After viewing this video I logged into Khan academy to check out the practice tracking features highlighted in the video. Mainly I wanted to see the categorical branching of subjects that they showed. Its a pretty amazing idea and execution. From one basic subject, addition, they expand and branch out all the way down to basic calculus. It would be really amazing if they continued expanding this out to the point where all subjects where mapped out, even the less mathematical ones. Just to see the path from addition to trigonometry is a pretty good refresher of what the mechanics of the trig functions actually entail. Imagine seeing the path from addition to linear algebra. More to the point, imagine a world in which a student uses this system throughout their educational career. I can't even fathom the difference that that level of tracking and relational mapping between ideas would have on a students understanding of material and motivation to tackle new subjects.
adrianbye 16y ago
I worked with Sal when we were both at Oracle. one thing i think is that what he's doing with khan academy ties directly to his strengths. he was very good at explaining and teaching, and liked analyzing data.
wyclif 16y ago
Awesome speech. What's wrong with the YouTube video quality, though?
arjn 16y ago
Khanacademy is neat but I find it odd that people on HN either aren't aware or dont care about other earlier sources such as : - MIT's OCW - USNW eLearning channel on Youtube (esp Richar Buckland) - TIMMS (Germany, possibly the first of the video resources) - UCBerkeley youtube channel - Dr. Adrian Banner (Princeton) - Harvard (esp Michael Sandel's lectures, amazing) The above can be easily searched for and are hardly a comprehensive list as that would be large. Here is a website which is a sort of clearinghouse for video lectures: www.cosmolearning.com A search of HN shows less attention given to these original sources than perhaps they deserve. In my opinion MIT OCW was the best known initiative till recent times and started this wave of online video learning. BTW, I highly recommend Michael Sandel's lectures on ethics and politics, available on YouTube.
- keiferski 16y ago
  Khan Academy is miles better than any of those when it comes to design and ease of use, especially when it comes to presenting the material to elementary/middle school aged children. I certainly don't think a MIT lecture will appeal to 5th graders.
  - arjn 16y ago
    All the links I posted are undergrad-grad level which is what I'd expect most HN visitors to be interested in. I assume not many 5th graders frequent HN (perhaps I should account for parents of 5th graders). While KA is definitely well organized, esp. for kids, "miles better" is hyperbole. There are other resources for young learners such as mathvids, brightstorm.com (and others) with little or no mention on HN. There are also cheap/paid/freemium resources for kids - eg. mathtv.com and yourteacher.com (I think yourteacher has been around for a while. My overall point is that - regarding this topic, HN seems to have a rather narrow view or is completely unaware of existing resources.
  - ibejoeb 16y ago
    For me, the presentation is just better. There's something about 10-12 minute lessons, and obviously the thought that goes into distilling it to that size, that makes it digestible. (I'm really curious how much time goes into making one 10 minute lesson.) It sticks. One caveat: I've been exposed to this material before in other contexts, so it's more like a phenomenal refresher. I can't know if this is a better way to teach from scratch. But, frankly, it's been long enough, or I was just that bad at it the first time, that it sometimes feels like I never learned it in the first place. This gives me some degree of confidence that it's at least one right way.
tammam 16y ago
I believe his method has a ton of potential. First saw Khan on This Week in Startups: http://thisweekin.com/thisweekin-startups/this-week-in-startups-94-with-salman-khan-founder-of-khan-academy/ http://thisweekin.com/thisweekin-startups/this-week-in-start... and was impressed to learn that Bill Gates invited him to talk. I think his method works for many people and could change the way many people learn.
Rickasaurus 16y ago
As a kid I had ADHD, I found myself staying up all night programming and sleeping in my classes. The skills I leanred then have served me well but if the classroom was more engaging maybe I wouldn't have had such a difficult path. I hope this spreads like wildfire.
dr_ 16y ago
This is great, but I wish there were some lessons on coding. Computer programming at some basic level at least should be required of all students - even if they don't make a career out of it, being able to work snippets of code will come in handy across all disciplines in the future - finance, medicine, media, or repairing that broken fridge in your e-home.
zmmmmm 16y ago
This man is certainly one of my heroes. I love this part from the FAQ on the Khan Academy: What topics do you plan to cover? My goal is to cover everything. Yes, everything! ... My goal really is to keep making videos until the day I die (which will hopefully not be for at least another 50 or 60 years). Should give me time to make several tens of thousands of videos in pretty much every subject."
- GeorgeTirebiter 16y ago
  Very Asimovian, don't you think? Isaac Asimov wrote either 506 books (or 515, say some sources) in his 72-year lifetime. (Jan 2, 1920 - Apr 6, 1992)
  - enry_straker 16y ago
    Was about to make the very same point. I used to, and still, treasure the books on science that Mr.Asimov wrote. It was fantastic. I just wish that he had lived to see this phenomenon taking place. I think he would be very, very pleased with Salman
    - Tyr42 16y ago
      Yes, I found some of Asimov's science books in the school library, and I think the reason he wrote such good science fiction was that he could explain stuff really well. He really _got_ his settings, and the same when he wrote about real science. He was understandable.
- sylvinus 16y ago
  I'm also most impressed by Salman, definitely a genius. However I wonder if he should be the only one making those videos for his new non-profit? I'm sure there are experts in other fields than science who could keep his "style" and make the whole "reinvent education" thing go much faster?
dmvaldman 16y ago
As a university math TA, my students would often say "you're so much better than the teacher, why don't you teach the class?" Hearing this is definitely an ego stroke, but what the student really means is that he learns better by practicing problems than by listening to theory. I feel this is even more true in a younger school environment. The teacher's and TA's roles are simply different in this respect, so I take no credit for "being better than the teacher". But what Khan Academy does is really interesting, because now the teacher takes the role of the TA. I feel this is a much more effective way to teach. And ultimately the student will benefit. Thumbs up to this philosophy.
- solarmist 16y ago
  I think this is a really keen observation.
chsonnu 16y ago
The record keeping is a double edged sword. Maybe one day institutions will start using your Khan record as a metric for employment/admissions. And that's the day people will start cheating. I guess this means standardized tests like the SATs and GREs aren't going anywhere.
modeless 16y ago
I think what could eventually be even more impactful than the videos themselves is the statistics tracking he showed. With that kind of data across thousands or millions of people, you would see patterns of people who had the same problems and questions in the same places, and you could redo the videos to be more clear in those areas and answer those questions preemptively. With a web-scale audience you could do A-B testing experiments and optimize the performance of your teaching material. I think a curriculum optimized in this way could eventually be dramatically better than even the best traditional education has to offer today. Today teaching is an art; this could turn it into a science.
econner 16y ago
I've been looking at the Khan Academy site a bit. I find the exercise dashboard kind of strange. Is math the only available subject? And do you have to go through all the prerequisite exercises to progress to the next ones?
- kamens 16y ago
  At the moment, yes, math only. We're working to entirely cover K-12 math before moving on. You can jump to any area or exercise you want at any time. We suggest exercises, but I've seen plenty of 5th graders jump to Calculus and play around with Limits just because it's interesting/challenging and they saw their friend try it.
  - econner 16y ago
    Ah, that's really cool and thanks for your reply. You guys are doing some incredible work. One thing you guys might be interested in: https://courseware.stanford.edu/pg/concept_map/index/41601 https://courseware.stanford.edu/pg/concept_map/index/41601 Daphne Koller is a Stanford CS professor who has been teaching her course CS228 on Probabilistic Models in a similar format for a couple of years. She has the lectures online by chunks of about 10 minutes and then uses in-class time for more interactive sessions. (I'm not sure if you can access the videos if you don't have a Stanford login though) I really think this method of learning makes so much sense for any level student. Can't wait to see it progress!
hanifvirani 16y ago
The long standing ovation at the end was so well deserved. I had a smile on my face as I watched it.
singular 16y ago
This is wonderful. Education is, IMHO, the most important thing in the world, full stop, since it forms the basis for what we are able to do and more importantly how we think. Personally, I found school boring and tedious (and got pretty average grades) until going to 6th form college where I discovered something amazing - learning isn't defined by a failed teaching system - learning done right is a joyful and wonderful thing (unsurprisingly my grades significantly improved at this point). The fact that learning is a joy is one of the most important discoveries you make in life (or don't, unfortunately I think most people don't) and anything that allows people to discover this is a vastly important thing. (It's important to note that learning, as with everything else, isn't 100% joyful all the time, but that the joy of it infinitely outweighs any difficulty and pain encountered along the way). I've noticed a pernicious worship of ignorance that pervades, at least, my country (the UK) - the idea that learning is boring and there's something wrong with you if you seem to enjoy it - that alone is to my mind incredibly dangerous. Nothing could be further from the truth, literally. This is nothing, though, compared to countries where ordinary people are simply unable to access quality education or even any education at all where the Khan academy is an example of the internet at its democratising best. Go Sal!
tRAS 16y ago
I think most people miss the point that the statistics provided by the Khan Academy is equally kick-ass as its videos. He mentions of a "teacher driven" design process. TDD? ;)
yannickmahe 16y ago
I thought eLearning was something impossible to do efficiently - before I saw this video. A compelling argument, and a great method! I can't count the startup ideas that could come from this.
paufernandez 16y ago
Actually, I got so excited (and moved) when I saw his talk at GEL: http://www.youtube.com/watch?v=yTXKCzrFh3c http://www.youtube.com/watch?v=yTXKCzrFh3c That I started my own channel for Programming in C++, for my students... I have 74 videos already... (in Spanish, sorry) http://www.youtube.com/user/paueky http://www.youtube.com/user/paueky
robertk 16y ago
I actually swelled up in tears when he showed the spreadsheet of student progress, and suggested having the students with red blocks (those who are stuck on a concept) being given help from the students with green blocks (those who mastered it). That is so beautiful.
- dave1619 16y ago
  I agree. Something about his talk stirred up deep emotions in me too.
- yread 16y ago
  For me it was the moment where he showed the progress of students and how the (initially) slow learner picked up the concepts faster and faster.
raheemm 16y ago
And it all started with him tutoring his cousins long-distance while maintaining a busy work schedule. There is something real special about that - willingness to spend "free" time, willingness to tutor in spite of the distance (he was in Boston and his cousins were in Louisiana). Either of these reasons would have been sufficient excuses for him to not help his cousins. Lucky for them and for all of us that such an amazing talent was so generous with his time and insistent on using technology to overcome the distance barrier.
georgi0u 16y ago
After reading a few comments, I haven't seen this point made so I'm gonna go for it: > The traditional model, it penalizes you for experimentation and failure, > but does not expect mastery. > We encourage you to experiment [and fail], but we do expect mastery. This, in my opinion, is the most potential ridden idea made by Khan. Today, middle schools is ~3 years, high school is 4 years, university is 4 years, etc.; we discretize learning into these rigid chunks of time - partially out of (deprecated) technical necessity - and in the process we isolate kids - the so called dumb kids. When Kahn showed that graph of a so called dumb kids spending 2-3x as long on a single topic, only to resume the same learning rate as the smart kids after they understood the foundational concept they were originally struggling with, it made me see how much potential there truly is in this system. Imagine a world where the baseline level of education is produced by a Khan style system. Schooling wouldn't be as tractable (i.e., it might take 2 to 6 (or more) years to go through high school instead of a nice predictable 4), but everyone that would come out of said system would have the same (ideal) level of knowledge needed in order to move on to the next best thing (e.g., college, work, life's passion, etc.). There wouldn't be kids competing for GPA's or stuffing their resumes, and there wouldn't be kids who didn't know how to tie their shoes; there would be kids who KNOW calculus, kids who UNDERSTAND physics, and kids who GET American history. The variation would be in the idiosyncrasies of the topics, as opposed to the core concepts. Now imagine further to what this does for higher education. In this proposed system, it would simply be a fact that graduating kids would know - at mastery level - what their school's curriculums listed off; it's the equivalent of everyone having a 1600 on their SAT's. College acceptance becomes less of a selectivity problem, and more of an efficiency problem; where are all these geniuses going to study! Ahhh, the potential is so exciting... That being said, as sort of an aside I think it's noteworthy to say that the idea of fixing the tuition-based University model is a bit more complex than the high school model, but as user arjn said bellow, there are plenty of free lecture repositories out there already; perhaps if prior educational systems encouraged and indoctrinated students to be more self-proficient (as in the Khan system), University learning becomes more about educating yourself, and those free lectures will (naturally) replace the pay-to-learn model. I don't know, but it's a thought...
- pbhjpbhj 16y ago
  >and there wouldn't be kids who didn't know how to tie their shoes; I've met at least a few people who, being charitable, I would be extremely hard pressed to see passing a calculus exam. I'd agree that for some it's down to motivation but the motivation may come 20+years later or not at all. Certainly though I'm extremely wary of declaring that all people can attain the same intellectual level which appears to be what you claim. I'm not going to say it's impossible but I think you must have missed a step where you do some sort of brain augmentation or injection of nanobots to build knowledge pathways without any need to apply a learning process ...
sili 16y ago
Besides other good things about shifting teacher's work from lecturing to actually spending time with kids that were mentioned here, I would like to point out that some teachers are really bad lecturers. My most vivid impressions are from early collage math courses but it is as valid for high school as well. The professor can lead the lecture at million words a minute constantly erasing the board so you don't have the time to copy the material, let alone let it sink in. The professor can have heavy accent, so you spend most of you attention just trying to understand his words.
MicahNance 16y ago
As someone who was often bored during school lectures, I think the idea is great. One of the things I love about the Internet is that, in many cases, only the best rises to the top. That means people everywhere can have access to the best information on a subject, or in this case, the best video lecture. I think that is awesome, because it seems that the smaller the town/school/college, the rarer good professionals are. There are a lot of problems tangled up in in this that also need to be solved. His model relies on students watching lectures at home. Not everyone has broadband; some don't even have a computer. What do you do for those kids? Do you send home DVDs? What if there is no TV? (probably rare in the US, but still) Do you give every student a free laptop? I understand Los Altos is a pilot program, but quoting Wikipedia: "It is one of the wealthiest places in the United States." What do you do in the inner city or in very rural areas? Obviously the people behind this are very smart and I'm sure they are considering all the issues involved, this is just my brain dump after watching. I like the lecture-as-homework idea. It seems that less of everyone's time will be wasted with that method. Teachers/parents will have a much better idea of how long the "homework" will take, because the video is a fixed length +/- the rewinding/fast forwarding. In the classroom, everyone gets the attention they need. Things I'm curious about: What about the students who work faster than the rest? I guess they eventually reach the end of the curriculum for that particular course. Do they move to the next classes' topics or is there some set of optional topics that they can choose based on personal interest? What kinds of tests are there? He talked about the current models shortcomings(some student fail the test, but the class moves on anyway), but are there any big tests or final exams on the model? Or, is it entirely "quizzes?" Have the teachers noticed an improvement in student behavior? Do they spend less time on disciplinary action due to the more interactive sessions?
Mizza 16y ago
Because the site doesn't make it obvious, Khan Academy is an Open Source project: https://code.google.com/p/khanacademy/ https://code.google.com/p/khanacademy/
pacomerh 16y ago
I love this idea. I've been watching the KhanA videos for a while now, and learning about the U.S history ;) economy, and what not (I'm from Mexico), I'd love to see these videos in multiple languages.
harscoat 16y ago
Beauty of the graph at 13'50" - It is good to believe in children/people and do sthg about it as Khan does.
Kilimanjaro 16y ago
Idea HN: Make transcripts of all videos in KhanAcademy and have them presented with blackboard images and all, nicely organized in a web page with links to original videos.
teyc 16y ago
I admire Khan. Although he is not unique in his approach, he is uniquely positioned to deliver this message. By quitting his job and giving away his time, he is an ideal ambassador to the message of "scalable pedagogy". As he has described, if Isaac Newton had recorded his lessons on Youtube, Khan wouldn't have to. By giving alway classroom tools like test management and monitoring, he is also equipping teachers to become more scalable and as he described - data driven.
semerda 16y ago
He has great videos on his site esp on "Valuation and Investing" and "Venture Capital and Capital Markets". After you watch those everything just makes perfect sense.

492 points by zootar 16y ago

joshu 16y ago

Saw this live. He's amazing.

MikeCapone 16y ago
He is. Hero material. I have a feeling we'll be talking about him in decades the way people talk about Feynman now. Making people want to learn and helping them do it is a noble thing.
- joshu 16y ago
  Yeah. Turns out I live in the town he mentions -- on the street for one of the schools. If I listened hard, I wonder if I could hear paradigms shifting.
kenjackson 16y ago
I've seen a lot of TED lecture. But as a parent I think this may have been the most important one I've seen yet. I've used the Khan lectures, but hadn't seenn the vision. It's one of those rare times where I feel like I have seen the future -- and I really like it.

omfut 16y ago

It was a great talk. Future of education. I loved the way Bill interacted with Khan.

joshbert 16y ago
He has stated in numerous occasions that his children use Khan Academy's videos. I really admire Sal for what he's doing with global education. He is a big inspiration for anyone looking to change the world. Specially hackers.
quickpost 16y ago
Ya, for sure. Bill was as awestruck as the rest of us.

solarmist 16y ago

Over the years I've found lectures less and less useful to attend in person as profs and other presenters post their lectures and powerpoint slides online. I can just watch/read those and get everything I need from those materials, then when I'm in class I can ask much more useful questions and cover the details that really make the difference. I love how the Khan Academy is institutionalizing that idea. I can't see any reason that lectures need to be done in person, but being able to work through sticking points with someone. Now that is valuable. I really do think Sal Khan will revolutionize teaching. At least in the areas this model is applicable.

thenicepostr 16y ago

nice post wb. does he use prezi for his presentations?

deleted 16y ago
[deleted]
sgentle 16y ago
I too am curious about this. It didn't look like prezi, but it certainly had zooming and embedded live video and some other neat things.

aashpak1 16y ago

I found it very interesting how he applied data-analysis techniques [at time 12:33 in the video] to provide teachers with a better and correct understanding of each student's shortcomings (probably from his insights from his earlier profession on the Wall St.) that will take the student/tutor interaction to a new level!

solarmist 16y ago
What I found more interesting was that lack of those tools in current teaching. I can't believe no one's made those kind of analysis tools available to teachers before.
- kamens 16y ago
  Can't agree with this enough. Every time we make a new chart I think to myself, "Well that wasn't rocket science," and then when we show teachers they go absolutely nuts.
  - snarknet 16y ago
    Maybe I'm just tired, but what do you mean by chart? A personalized one tailored to a student? Edit: Ignore this, read your blog, very insightful.
- ianl 16y ago
  In a traditional class room its not possible to collect that data in a practical sense. Teachers are already over worked and technology is in short supply. Which is why tools like these are not available, its only possible here because all students are interacting with the khanacademy.org system.
  - piguy314 16y ago
    Low hanging fruit: -Import scantron test data into a database to analyze which questions students got right/wrong (http://www.scantron.com/cognition/faqs.aspx http://www.scantron.com/cognition/faqs.aspx) -Analyze teachers gradebooks (most are already in excel or an LMS) to see which types of assignments students excel/do poorly at. -Provide comprehensive SAT9/STAR/PISA test data to schools for analysis on individual student strengths/weakesses Seems like the problem is not necessarily lack of data... In fact when the freakonomics team applied econometric analysis to large quantities of data already possessed by the Chicago school district they were able to prove cheating on standardized tests (http://www.wikisummaries.org/Freakonomics:_A_Rogue_Economist_Explores_the_Hidden_Side_of_Everything#Chapter_1:_What_Do_Schoolteachers_and_Sumo_Wrestlers_Have_in_Common.3F http://www.wikisummaries.org/Freakonomics:_A_Rogue_Economist...)

runevault 16y ago

Really wonderful reminder of what just one person can set in motion. I could easily see him becoming considered one of the most important people of this century based on what he is doing for education and its globalization.

barkmadley 16y ago

Here is a link because ted.com is just as awesome as youtube.com http://www.ted.com/talks/salman_khan_let_s_use_video_to_reinvent_education.html http://www.ted.com/talks/salman_khan_let_s_use_video_to_rein... Also is the youtube video a strange colour red for anyone else?

trystero 16y ago
I can't wait for the subtitles to be uploaded, so that I can share with my friends who can't be bothered to watch something which is not in their language.

solipsist 16y ago

I've heard countless people rave about Salman Khan and his teaching methods - both here and away from HN. The truth is, I had no idea why he and his teachings were such a big deal...until now. I had seen some of his videos before and read some of the articles about the Khan Academy, but had never given them my full attention. To me, it was just another guy with his own teaching methods. But when I see him talk at TED, it makes perfect sense. Not only is he a superb speaker, he gets his points across clearly. Probably the best point of all is this one: "What I do is I assign the lectures for homework and, what used to be homework, I now have the students doing in the classroom." As radical as that may seem, this idea has TONS of potential. Do we really need teachers there in person if they are just lecturing? The real use of being there in person as a teacher is for interacting with the students. What better way to do that than by helping them with the work (i.e. homework) and letting the Khan Academy lecture when little interaction is needed. I am definitely going to hop on the bandwagon now and join everyone else in following Khan while appreciating his pure genius. In fact, the best way to describe him is to combine all the great things people here on HN have to say about him: > He's amazing. (joshu) > I really do think Sal Khan will revolutionize teaching. (solarmist) > Hero material. (MikeCapone) > Future of education. (omfut) > Really wonderful reminder of what just one person can set in motion. (runevault) > Simply amazing that a guy armed only with a tablet and a microphone can have this much impact. (keiferski) > He is a big inspiration for anyone looking to change the world. (omfut) The list could go on forever. And it's not every day you hear people talking about someone and their ideas in such a way like they are now about Khan and the Khan Academy. If people are saying it is amazing, then there's a pretty good chance that it truly is amazing.

aashpak1 16y ago
totally agree - making the self-learning part offline and creating more and better (teachers would know exactly where a particular student is having problems understanding) interactions is the best part of his model.
- solipsist 16y ago
  Yeah, the data from the students' interaction with the video could be sent back to the teachers and end up creating a comprehensive profile of each of the student's understanding on that particular topic. Then, in the classroom, the teacher would be able to walk from student to student (or form groups of students with similar strengths/weaknesses) and provide the help they needed based on their profiles. This help would be the help that relies on direct interaction between the teacher and student.

keiferski 16y ago

Simply amazing that a guy armed only with a tablet and a microphone can have this much impact.

DanielN 16y ago

After viewing this video I logged into Khan academy to check out the practice tracking features highlighted in the video. Mainly I wanted to see the categorical branching of subjects that they showed. Its a pretty amazing idea and execution. From one basic subject, addition, they expand and branch out all the way down to basic calculus. It would be really amazing if they continued expanding this out to the point where all subjects where mapped out, even the less mathematical ones. Just to see the path from addition to trigonometry is a pretty good refresher of what the mechanics of the trig functions actually entail. Imagine seeing the path from addition to linear algebra. More to the point, imagine a world in which a student uses this system throughout their educational career. I can't even fathom the difference that that level of tracking and relational mapping between ideas would have on a students understanding of material and motivation to tackle new subjects.

adrianbye 16y ago

I worked with Sal when we were both at Oracle. one thing i think is that what he's doing with khan academy ties directly to his strengths. he was very good at explaining and teaching, and liked analyzing data.

wyclif 16y ago

Awesome speech. What's wrong with the YouTube video quality, though?

arjn 16y ago

Khanacademy is neat but I find it odd that people on HN either aren't aware or dont care about other earlier sources such as : - MIT's OCW - USNW eLearning channel on Youtube (esp Richar Buckland) - TIMMS (Germany, possibly the first of the video resources) - UCBerkeley youtube channel - Dr. Adrian Banner (Princeton) - Harvard (esp Michael Sandel's lectures, amazing) The above can be easily searched for and are hardly a comprehensive list as that would be large. Here is a website which is a sort of clearinghouse for video lectures: www.cosmolearning.com A search of HN shows less attention given to these original sources than perhaps they deserve. In my opinion MIT OCW was the best known initiative till recent times and started this wave of online video learning. BTW, I highly recommend Michael Sandel's lectures on ethics and politics, available on YouTube.

keiferski 16y ago
Khan Academy is miles better than any of those when it comes to design and ease of use, especially when it comes to presenting the material to elementary/middle school aged children. I certainly don't think a MIT lecture will appeal to 5th graders.
- arjn 16y ago
  All the links I posted are undergrad-grad level which is what I'd expect most HN visitors to be interested in. I assume not many 5th graders frequent HN (perhaps I should account for parents of 5th graders). While KA is definitely well organized, esp. for kids, "miles better" is hyperbole. There are other resources for young learners such as mathvids, brightstorm.com (and others) with little or no mention on HN. There are also cheap/paid/freemium resources for kids - eg. mathtv.com and yourteacher.com (I think yourteacher has been around for a while. My overall point is that - regarding this topic, HN seems to have a rather narrow view or is completely unaware of existing resources.
- ibejoeb 16y ago
  For me, the presentation is just better. There's something about 10-12 minute lessons, and obviously the thought that goes into distilling it to that size, that makes it digestible. (I'm really curious how much time goes into making one 10 minute lesson.) It sticks. One caveat: I've been exposed to this material before in other contexts, so it's more like a phenomenal refresher. I can't know if this is a better way to teach from scratch. But, frankly, it's been long enough, or I was just that bad at it the first time, that it sometimes feels like I never learned it in the first place. This gives me some degree of confidence that it's at least one right way.

tammam 16y ago

I believe his method has a ton of potential. First saw Khan on This Week in Startups: http://thisweekin.com/thisweekin-startups/this-week-in-startups-94-with-salman-khan-founder-of-khan-academy/ http://thisweekin.com/thisweekin-startups/this-week-in-start... and was impressed to learn that Bill Gates invited him to talk. I think his method works for many people and could change the way many people learn.

Rickasaurus 16y ago

As a kid I had ADHD, I found myself staying up all night programming and sleeping in my classes. The skills I leanred then have served me well but if the classroom was more engaging maybe I wouldn't have had such a difficult path. I hope this spreads like wildfire.

dr_ 16y ago

This is great, but I wish there were some lessons on coding. Computer programming at some basic level at least should be required of all students - even if they don't make a career out of it, being able to work snippets of code will come in handy across all disciplines in the future - finance, medicine, media, or repairing that broken fridge in your e-home.

zmmmmm 16y ago

This man is certainly one of my heroes. I love this part from the FAQ on the Khan Academy: What topics do you plan to cover? My goal is to cover everything. Yes, everything! ... My goal really is to keep making videos until the day I die (which will hopefully not be for at least another 50 or 60 years). Should give me time to make several tens of thousands of videos in pretty much every subject."

GeorgeTirebiter 16y ago
Very Asimovian, don't you think? Isaac Asimov wrote either 506 books (or 515, say some sources) in his 72-year lifetime. (Jan 2, 1920 - Apr 6, 1992)
- enry_straker 16y ago
  Was about to make the very same point. I used to, and still, treasure the books on science that Mr.Asimov wrote. It was fantastic. I just wish that he had lived to see this phenomenon taking place. I think he would be very, very pleased with Salman
  - Tyr42 16y ago
    Yes, I found some of Asimov's science books in the school library, and I think the reason he wrote such good science fiction was that he could explain stuff really well. He really _got_ his settings, and the same when he wrote about real science. He was understandable.
sylvinus 16y ago
I'm also most impressed by Salman, definitely a genius. However I wonder if he should be the only one making those videos for his new non-profit? I'm sure there are experts in other fields than science who could keep his "style" and make the whole "reinvent education" thing go much faster?

dmvaldman 16y ago

As a university math TA, my students would often say "you're so much better than the teacher, why don't you teach the class?" Hearing this is definitely an ego stroke, but what the student really means is that he learns better by practicing problems than by listening to theory. I feel this is even more true in a younger school environment. The teacher's and TA's roles are simply different in this respect, so I take no credit for "being better than the teacher". But what Khan Academy does is really interesting, because now the teacher takes the role of the TA. I feel this is a much more effective way to teach. And ultimately the student will benefit. Thumbs up to this philosophy.

solarmist 16y ago
I think this is a really keen observation.

chsonnu 16y ago

The record keeping is a double edged sword. Maybe one day institutions will start using your Khan record as a metric for employment/admissions. And that's the day people will start cheating. I guess this means standardized tests like the SATs and GREs aren't going anywhere.

modeless 16y ago

I think what could eventually be even more impactful than the videos themselves is the statistics tracking he showed. With that kind of data across thousands or millions of people, you would see patterns of people who had the same problems and questions in the same places, and you could redo the videos to be more clear in those areas and answer those questions preemptively. With a web-scale audience you could do A-B testing experiments and optimize the performance of your teaching material. I think a curriculum optimized in this way could eventually be dramatically better than even the best traditional education has to offer today. Today teaching is an art; this could turn it into a science.

econner 16y ago

I've been looking at the Khan Academy site a bit. I find the exercise dashboard kind of strange. Is math the only available subject? And do you have to go through all the prerequisite exercises to progress to the next ones?

kamens 16y ago
At the moment, yes, math only. We're working to entirely cover K-12 math before moving on. You can jump to any area or exercise you want at any time. We suggest exercises, but I've seen plenty of 5th graders jump to Calculus and play around with Limits just because it's interesting/challenging and they saw their friend try it.
- econner 16y ago
  Ah, that's really cool and thanks for your reply. You guys are doing some incredible work. One thing you guys might be interested in: https://courseware.stanford.edu/pg/concept_map/index/41601 https://courseware.stanford.edu/pg/concept_map/index/41601 Daphne Koller is a Stanford CS professor who has been teaching her course CS228 on Probabilistic Models in a similar format for a couple of years. She has the lectures online by chunks of about 10 minutes and then uses in-class time for more interactive sessions. (I'm not sure if you can access the videos if you don't have a Stanford login though) I really think this method of learning makes so much sense for any level student. Can't wait to see it progress!

hanifvirani 16y ago

The long standing ovation at the end was so well deserved. I had a smile on my face as I watched it.

singular 16y ago

This is wonderful. Education is, IMHO, the most important thing in the world, full stop, since it forms the basis for what we are able to do and more importantly how we think. Personally, I found school boring and tedious (and got pretty average grades) until going to 6th form college where I discovered something amazing - learning isn't defined by a failed teaching system - learning done right is a joyful and wonderful thing (unsurprisingly my grades significantly improved at this point). The fact that learning is a joy is one of the most important discoveries you make in life (or don't, unfortunately I think most people don't) and anything that allows people to discover this is a vastly important thing. (It's important to note that learning, as with everything else, isn't 100% joyful all the time, but that the joy of it infinitely outweighs any difficulty and pain encountered along the way). I've noticed a pernicious worship of ignorance that pervades, at least, my country (the UK) - the idea that learning is boring and there's something wrong with you if you seem to enjoy it - that alone is to my mind incredibly dangerous. Nothing could be further from the truth, literally. This is nothing, though, compared to countries where ordinary people are simply unable to access quality education or even any education at all where the Khan academy is an example of the internet at its democratising best. Go Sal!

tRAS 16y ago

I think most people miss the point that the statistics provided by the Khan Academy is equally kick-ass as its videos. He mentions of a "teacher driven" design process. TDD? ;)

yannickmahe 16y ago

I thought eLearning was something impossible to do efficiently - before I saw this video. A compelling argument, and a great method! I can't count the startup ideas that could come from this.

paufernandez 16y ago

Actually, I got so excited (and moved) when I saw his talk at GEL: http://www.youtube.com/watch?v=yTXKCzrFh3c http://www.youtube.com/watch?v=yTXKCzrFh3c That I started my own channel for Programming in C++, for my students... I have 74 videos already... (in Spanish, sorry) http://www.youtube.com/user/paueky http://www.youtube.com/user/paueky

robertk 16y ago

I actually swelled up in tears when he showed the spreadsheet of student progress, and suggested having the students with red blocks (those who are stuck on a concept) being given help from the students with green blocks (those who mastered it). That is so beautiful.

dave1619 16y ago
I agree. Something about his talk stirred up deep emotions in me too.
yread 16y ago
For me it was the moment where he showed the progress of students and how the (initially) slow learner picked up the concepts faster and faster.

raheemm 16y ago

And it all started with him tutoring his cousins long-distance while maintaining a busy work schedule. There is something real special about that - willingness to spend "free" time, willingness to tutor in spite of the distance (he was in Boston and his cousins were in Louisiana). Either of these reasons would have been sufficient excuses for him to not help his cousins. Lucky for them and for all of us that such an amazing talent was so generous with his time and insistent on using technology to overcome the distance barrier.

georgi0u 16y ago

After reading a few comments, I haven't seen this point made so I'm gonna go for it: > The traditional model, it penalizes you for experimentation and failure, > but does not expect mastery. > We encourage you to experiment [and fail], but we do expect mastery. This, in my opinion, is the most potential ridden idea made by Khan. Today, middle schools is ~3 years, high school is 4 years, university is 4 years, etc.; we discretize learning into these rigid chunks of time - partially out of (deprecated) technical necessity - and in the process we isolate kids - the so called dumb kids. When Kahn showed that graph of a so called dumb kids spending 2-3x as long on a single topic, only to resume the same learning rate as the smart kids after they understood the foundational concept they were originally struggling with, it made me see how much potential there truly is in this system. Imagine a world where the baseline level of education is produced by a Khan style system. Schooling wouldn't be as tractable (i.e., it might take 2 to 6 (or more) years to go through high school instead of a nice predictable 4), but everyone that would come out of said system would have the same (ideal) level of knowledge needed in order to move on to the next best thing (e.g., college, work, life's passion, etc.). There wouldn't be kids competing for GPA's or stuffing their resumes, and there wouldn't be kids who didn't know how to tie their shoes; there would be kids who KNOW calculus, kids who UNDERSTAND physics, and kids who GET American history. The variation would be in the idiosyncrasies of the topics, as opposed to the core concepts. Now imagine further to what this does for higher education. In this proposed system, it would simply be a fact that graduating kids would know - at mastery level - what their school's curriculums listed off; it's the equivalent of everyone having a 1600 on their SAT's. College acceptance becomes less of a selectivity problem, and more of an efficiency problem; where are all these geniuses going to study! Ahhh, the potential is so exciting... That being said, as sort of an aside I think it's noteworthy to say that the idea of fixing the tuition-based University model is a bit more complex than the high school model, but as user arjn said bellow, there are plenty of free lecture repositories out there already; perhaps if prior educational systems encouraged and indoctrinated students to be more self-proficient (as in the Khan system), University learning becomes more about educating yourself, and those free lectures will (naturally) replace the pay-to-learn model. I don't know, but it's a thought...

pbhjpbhj 16y ago
>and there wouldn't be kids who didn't know how to tie their shoes; I've met at least a few people who, being charitable, I would be extremely hard pressed to see passing a calculus exam. I'd agree that for some it's down to motivation but the motivation may come 20+years later or not at all. Certainly though I'm extremely wary of declaring that all people can attain the same intellectual level which appears to be what you claim. I'm not going to say it's impossible but I think you must have missed a step where you do some sort of brain augmentation or injection of nanobots to build knowledge pathways without any need to apply a learning process ...

sili 16y ago

Besides other good things about shifting teacher's work from lecturing to actually spending time with kids that were mentioned here, I would like to point out that some teachers are really bad lecturers. My most vivid impressions are from early collage math courses but it is as valid for high school as well. The professor can lead the lecture at million words a minute constantly erasing the board so you don't have the time to copy the material, let alone let it sink in. The professor can have heavy accent, so you spend most of you attention just trying to understand his words.

MicahNance 16y ago

As someone who was often bored during school lectures, I think the idea is great. One of the things I love about the Internet is that, in many cases, only the best rises to the top. That means people everywhere can have access to the best information on a subject, or in this case, the best video lecture. I think that is awesome, because it seems that the smaller the town/school/college, the rarer good professionals are. There are a lot of problems tangled up in in this that also need to be solved. His model relies on students watching lectures at home. Not everyone has broadband; some don't even have a computer. What do you do for those kids? Do you send home DVDs? What if there is no TV? (probably rare in the US, but still) Do you give every student a free laptop? I understand Los Altos is a pilot program, but quoting Wikipedia: "It is one of the wealthiest places in the United States." What do you do in the inner city or in very rural areas? Obviously the people behind this are very smart and I'm sure they are considering all the issues involved, this is just my brain dump after watching. I like the lecture-as-homework idea. It seems that less of everyone's time will be wasted with that method. Teachers/parents will have a much better idea of how long the "homework" will take, because the video is a fixed length +/- the rewinding/fast forwarding. In the classroom, everyone gets the attention they need. Things I'm curious about: What about the students who work faster than the rest? I guess they eventually reach the end of the curriculum for that particular course. Do they move to the next classes' topics or is there some set of optional topics that they can choose based on personal interest? What kinds of tests are there? He talked about the current models shortcomings(some student fail the test, but the class moves on anyway), but are there any big tests or final exams on the model? Or, is it entirely "quizzes?" Have the teachers noticed an improvement in student behavior? Do they spend less time on disciplinary action due to the more interactive sessions?

Mizza 16y ago

Because the site doesn't make it obvious, Khan Academy is an Open Source project: https://code.google.com/p/khanacademy/ https://code.google.com/p/khanacademy/

pacomerh 16y ago

I love this idea. I've been watching the KhanA videos for a while now, and learning about the U.S history ;) economy, and what not (I'm from Mexico), I'd love to see these videos in multiple languages.

harscoat 16y ago

Beauty of the graph at 13'50" - It is good to believe in children/people and do sthg about it as Khan does.

Kilimanjaro 16y ago

Idea HN: Make transcripts of all videos in KhanAcademy and have them presented with blackboard images and all, nicely organized in a web page with links to original videos.

teyc 16y ago

I admire Khan. Although he is not unique in his approach, he is uniquely positioned to deliver this message. By quitting his job and giving away his time, he is an ideal ambassador to the message of "scalable pedagogy". As he has described, if Isaac Newton had recorded his lessons on Youtube, Khan wouldn't have to. By giving alway classroom tools like test management and monitoring, he is also equipping teachers to become more scalable and as he described - data driven.

semerda 16y ago

He has great videos on his site esp on "Valuation and Investing" and "Venture Capital and Capital Markets". After you watch those everything just makes perfect sense.