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> The real problem is that the demand for good teachers far exceeds the supply. The current teaching model simply doesn't scale. It worked well in the past, wh

> The real problem is that the demand for good teachers far exceeds the supply. The current teaching model simply doesn't scale. It worked well in the past, when most people got like 4 years of elementary school, and a few selected ones studied longer. Now we want everyone to sit at the school desk as long as possible, and preferably in small classes. (Yes, I understand why small classes are better. I am just saying we can't afford them for everyone without compromising on teachers' quality.) Just guessing the numbers: if people live 80 years on average, and spend maybe 15 years on average at school, that is like 20% of population being students. If you want 1 teacher per 20 students, that is 1% of population being teachers. We all have an idea of what an "ideal teacher" should look like. And some of us actually met someone like that in real life. But 1% of population having the required skills? Also, there are other professions competing for talent. If you make all good programmers teach computer science, who is going to write code? Similarly, who will do surgery, etc. What currently happens is that rich people (plus a few lucky non-rich people) succeed to get the best teachers for their kids... and the rest have to deal with what is left for them. With sources like Khan Academy, everyone on this planet could have a top-quality education. You only need to make the great video lecture once. It can even be translated to other languages by other people, who don't need to be good scientists or educators themselves, just good translators. Education could be free like, dunno, Linux or something. And yes, having a good human teacher is better than watching video. I am just saying it is a luxury that most students don't get. But everyone could watch the great video. So maybe we could change the school to be more like... uhm, maybe watching the videos together at school, and then having a debate about them? Then doing the related online tests, and again having a debate about what went wrong? We already accept written textbooks. We should do the same with videos.

webmaven 6y ago
> We already accept written textbooks. We should do the same with videos. I think that the point of textbooks is to lower the required subject matter expertise bar for teachers, leaving them to focus on teaching the material. Unfortunately, when a teacher is merely familiar with the material rather than understanding it deeply, they will find it difficult to explore multiple (valid) ways of explaining it to students until it 'clicks' for each one, which means students often fall back on rote memorization and mechanical competence. A video of a good (even great) teacher is no more interactive than a textbook, so if the student doesn't happen to 'get' the explanation as it is presented they are going to fall back on memorization and mechanical competence in exactly the same way. There are interactive learning environments with extensive libraries of content that explore material in multiple ways as needed (as indicated via assessments) by students, but AFAIK they are all proprietary.
- Viliam1234 6y ago
  The expertise of an average teacher is low, whether with textbooks or without them. For example, many math teachers at elementary schools fail at elementary school math. I have heard horror stories. Without textbooks, it wouldn't be any better. Only the kids wouldn't have a secondary source of information. I am completely in favor of having better teachers. I just don't see the way to find them, and people were already trying for decades, so whatever idea I would come up with, someone probably already tried it. (I know a few people who are working on a reform of mathematical education. It is from them that I know how the actual sitation is even worse than I imagined.) > A video of a good (even great) teacher is no more interactive than a textbook Agreed. Sometimes the video can contain helpful animations. My hope is that the videos could be updated more flexibly than the books. When you print a book, the next version comes in a decade. There are known errors in textbooks, but no one is going to spend money to reprint them again, just to fix the errors. It we could have the books online, we could fix the errors as they are found... but most people are not going to read books online. However, with videos hosted online, I hope it would be possibly to, dunno, add the errata as subtitles, or something. Another hope is greater fragmentation. A teacher is unlikely to recommend one chapter from one textbook, and another chapter from another textbook. Or recommend two textbooks, like "if you didn't understand the explanation in the first one, try the second one". With videos -- here I assume there would be a free version online -- this could be easier. I have seen many videos recorded by teachers during COVID. Some of them quite ok, considering the authors are amateurs. But the thing I like most is that if you have five teachers that teach the same grade, and make the videos for the whole year, you get five alternative videos for each topic. Now when anyone says "I don't get it", you can easily give them four more links and maybe that will help. Elementary school education is an area where you really need to think about how your solutions scale. If you do the right thing once, literally millions can benefit from it.

webmaven 6y ago

> We already accept written textbooks. We should do the same with videos. I think that the point of textbooks is to lower the required subject matter expertise bar for teachers, leaving them to focus on teaching the material. Unfortunately, when a teacher is merely familiar with the material rather than understanding it deeply, they will find it difficult to explore multiple (valid) ways of explaining it to students until it 'clicks' for each one, which means students often fall back on rote memorization and mechanical competence. A video of a good (even great) teacher is no more interactive than a textbook, so if the student doesn't happen to 'get' the explanation as it is presented they are going to fall back on memorization and mechanical competence in exactly the same way. There are interactive learning environments with extensive libraries of content that explore material in multiple ways as needed (as indicated via assessments) by students, but AFAIK they are all proprietary.

Viliam1234 6y ago
The expertise of an average teacher is low, whether with textbooks or without them. For example, many math teachers at elementary schools fail at elementary school math. I have heard horror stories. Without textbooks, it wouldn't be any better. Only the kids wouldn't have a secondary source of information. I am completely in favor of having better teachers. I just don't see the way to find them, and people were already trying for decades, so whatever idea I would come up with, someone probably already tried it. (I know a few people who are working on a reform of mathematical education. It is from them that I know how the actual sitation is even worse than I imagined.) > A video of a good (even great) teacher is no more interactive than a textbook Agreed. Sometimes the video can contain helpful animations. My hope is that the videos could be updated more flexibly than the books. When you print a book, the next version comes in a decade. There are known errors in textbooks, but no one is going to spend money to reprint them again, just to fix the errors. It we could have the books online, we could fix the errors as they are found... but most people are not going to read books online. However, with videos hosted online, I hope it would be possibly to, dunno, add the errata as subtitles, or something. Another hope is greater fragmentation. A teacher is unlikely to recommend one chapter from one textbook, and another chapter from another textbook. Or recommend two textbooks, like "if you didn't understand the explanation in the first one, try the second one". With videos -- here I assume there would be a free version online -- this could be easier. I have seen many videos recorded by teachers during COVID. Some of them quite ok, considering the authors are amateurs. But the thing I like most is that if you have five teachers that teach the same grade, and make the videos for the whole year, you get five alternative videos for each topic. Now when anyone says "I don't get it", you can easily give them four more links and maybe that will help. Elementary school education is an area where you really need to think about how your solutions scale. If you do the right thing once, literally millions can benefit from it.