Re: Uses in h.s.APcalculus

*To*: mathgroup at yoda.physics.unc.edu*Subject*: Re: Uses in h.s.APcalculus*From*: fateman at peoplesparc.berkeley.edu (Richard Fateman)*Date*: Wed, 30 Sep 92 09:41:30 PDT

In the last few years there have been a number of texts and proposals for combining computing and calculus. There have been a number of inquiries about how to best combine Mathematica (or Maple or ...) with such courses, or with associated labs. It is sometimes hard for instructors to remember what is difficult or easy from the students' point of view. Here are some opinions. NEGATIVES: If you recall how much trouble you had on epsilon-delta proofs, assuming they are still taught, I doubt that current computer systems would help. If you recall how much trouble you had (as a student) understanding the meaning of the tall skinny S and the "d" in integral(f(x) dx), or the x in f:x ->y, I doubt that current computer systems would help. If you recall how rushed you were in covering the material, adding new material on computer systems probably would not help. Once you have taught them enough to understand they have to type f[x_]:=Sin[x], some students will embarrass you with questions like "Wouldn't f=Sin at #& be better?" (Do you even know the answer? Do you care? Is this relevant to calculus [actually, it is relevant to "lambda calculus" but you aren't teaching that, are you?]) POSITIVES: Graphing math functions is very useful. Many programs can do graphing. You can have students buy a graphing calculator, perhaps for less money than the textbook. Numerical integration ("quadrature") is also useful. The calculators can do that too. As well as solving for the intersection of curves. These can help if you want to have a more numeric flavor to your course. If you really want to force students to learn to type and use computers so they can pass calculus, then you are helping them learn life skills that they may find more useful than epsilon-delta. THE BIG WIN, however, (in my opinion) is that you can ask your department chair to set up a lab with NEAT TOYS and advertise that your section of calculus will use SPANKING NEW COLOR COMPUTERS, and the students will be ALL EXCITED and spend ALL THEIR SPARE TIME fiddling with the lab equipment, and have LOTS O' FUN. You will gain credit for innovative teaching, and maybe be popular with the kids, who never really wanted to learn calculus anyway. Other comments: Some people seem to think that because you can do some symbolic (indefinite) integration that these programs would be especially useful to courses that teach humans how to do symbolic indefinite integration. This is not at all obvious to me. The primary use of systems should be in advanced courses where the need for integration (as well as ugly amounts of algebra) comes up. I am not particularly defending the current calculus curriculum, by the way. But the calculus reform movement has its own large literature.