3 ms·
I see many parallels with the post and my own experience. I got my PhD in math and taught many college math courses during that time. I was always saddened at t
by CogitoCogito 9y ago
I see many parallels with the post and my own experience. I got my PhD in math and taught many college math courses during that time. I was always saddened at the number of students that essentially viewed math as just an exercise in the memorization of algorithms (memorize differentiation and integration rules and chug away at problems). I would avoid teaching this way and instead give them fewer, "deeper" problems that "exercised the concepts".
Students (the "good" and "bad" ones would usually go through the same transition throughout the semester: they would first be very uncomfortable and generally dislike it, then after a few weeks they would start to get used to the process of thinking things through, and finally they would tend to like it much more than what they used to do (of course some students would absolutely despise the process even at the end). Some of the students that liked the process the most where the "bad" ones who were historically worse at the algorithmic style (and unsurprisingly some of the ones who were very good at that style took the longest to convince).
Personally I think it's very important to focus on such a style of teaching. If students apply Calculus at work, they'll usually be using some form of abstract reasoning (say finding a reasonable model for some phenomenon) or they will be applying numerical methods (or both), but rarely will specific memorized differentiation rules be necessary. Ironically I believe that the memorization of the steps is most useful to those going into theoretical mathematics where of course being able to do as many "basic" things without thinking will always help you focus on the "true problem".
The main issue with this approach is that it is hard for students to know if they understand something correctly (which I would argue may be the single most important intellectual skill to learn in life). They can't just look up an answer and see if they got it right, instead they basically have to ask themselves if their reasoning makes sense. The difficulty in this causes a huge amount of student angst and pushback making it more uncomfortable for the students and more work for the teachers. I think the main reason why we teach math as mainly rote learning is because it's the easiest way to teach. It's my job to go through the motions and your job to learn the algorithms as best you can. From the teaching perspective, this is relatively easy to teach, grade and defend.
As a final example, I think that the focus in Calculus on the Fundamental Theorem of Calculus is misplaced. It _is_ fundamental from a theoretical perspective, but essentially no numerical integration is done that way and instead the actual way that integrals are computed is some application of Riemann's methods. (The counterexample being languages like Mathematica which are specifically designed to solve things symbolically.) I found a very good exercise to write Riemann integrals in Python (which students could quickly understand as pseudocode) and use different methods (left-endpoint rule, midpoint rule, etc.) to compute the integral in different ways and verifying that the convergence matches errors predicted. I think this is the sort of reasoning that should be focused on much more rather than having students find anti-derivatives all day and simply repeating "remember plus C".
This is a bit of a long-winded and rambling post, but I do miss that aspect of teaching. Pushing students to realize their ability to reason about math was always very fulfilling. Not everyone enjoyed it, but the majority would come out realizing that they too can reason about math given enough patience and time.
- oculusthrift 9y agothere is definitely two distinct intelligences. one that relies on knowledge and memorization and one in reason. Much of math is taught the knowledge way, similiar to history or biology, and a certain type of person excels at this. However, a different set excel at the reasoning approach. i don't think one approach can teach all people howeverZ
- CogitoCogito 9y agoIt's definitely true that there is no one size fits all. It's unfortunate that we can't truly tailor learning individually in a class setting (well maybe technology can successfully change this, but I still don't think it's the case). When teaching one on one it is much easier to quickly hone in on a specific student's difficulty, but rarely are you afforded the opportunity. Also I don't want anyone to think that I believe that rote learning is bad per se. Memorizing basic steps is extremely important. That is what allows you to focus on the important aspects of a problem as opposed to the details. For example, you would be a fool to try to learn German grammar before you get a good enough base of vocabulary. In fact, I think one of the best first steps when learning something new is really memorizing the basics well. However, I come from the perspective that rote learning has been overdone. Most people come through their math education and never leave that learning style. That is what I find unfortunate and wish were different.
- bluGill 9y agoYou cannot be the type that relies on reason alone. You need a large set of facts to reason from. I don't need 2+2=4 - I could reason it out from first principals (where did I get them from?). However when I'm solving a larger problem it helps to know that 2+2=4 without having to figure it out or put it in a calculator. This is why all arguments fail to hold weight with me. You cannot have just one. You have to have facts to reason from, and you have to have reasoning ability to use those facts with. Now I will grant that you can have facts alone. They won't do you any good but you can have them. We can argue about which facts in particular are worth knowing (do you need to know cursive), since there is only so much time in a lifetime to learn facts eventually you need to choose to not learn some facts. It means you cannot reason from those facts, but some facts are not as useful as others. 2+2=4 is a universal fact that should be early on the list of facts to know (bushmen would disagree - it isn't useful to their world). Where was the battle of Bunker hill fought - useless in Australia, part of our shared cultural heritage in the US.