On Saturday, March 4, 2017 at 7:19:41 AM UTC, parisse wrote: > > > > Le vendredi 3 mars 2017 23:20:42 UTC+1, rjf a écrit : >> >> If you were teaching calculus, at what point would you want >> your students to take out a smartphone and do integrals? >> >> > At least as soon as they are at level n+1 if integration is teached at > level n. At level n, make 2 kinds of exam: one with CAS and one without. > > How much time would you allocate to teaching the syntax >> of the CAS, what to do with error messages, how to download >> the latest copy, etc.? >> > > My own experience with Xcas on a desktop is that it takes less than 1h for > 1st year students to be able to do basic CAS stuff (simplify, derive, > integrate, plot, etc.) and a little more with CAS calculators. Running Xcas > on a smartphone is really straightforward, just open the URL > <http://www-fourier.ujf-grenoble.fr/~parisse/xcasen.html>, while > installing it locally for an exam takes a few more steps (install an > unarchive app, run it and locate the HTML5 page on the device). >
Why isn't xcas on Android Play store (so that the installation really goes as it is normally done with Android apps)? Note that I can run Maxima on Android, and it is installable this way. https://play.google.com/store/apps/details?id=jp.yhonda&rdid=jp.yhonda > > And what benefit would this be to >> the student who may still need to solve problems without >> a CAS for a written exam? >> > > I believe that CAS devices should be allowed for exam except for short > interrogations where you check very basic stuff. That could be calculators, > or smartphone/tablets with some way to disconnect them from the network. > > >> Or do we assume that it is no longer necessary to teach >> methods of integration, just as it is no longer necessary >> to teach how to compute square-roots, or how to >> interpolate in a table of logarithms. >> > > It depends. Integration by part for example should be teached. Or > integrating simple rational fractions (say denominators of degree 2). But I > believe it is not required anymore to teach how to compute by hand higher > degree fractions like 1/(x^2-1)/(x^2+x+1)^2, today it's more important to > know how to do it with a CAS and how to check that you did not make a typo. > > >> Having taught a calculus + computer lab many years >> ago (1973! at MIT), the students were more interested >> in the Risch algorithm (simple version) than "regular" >> stuff. Even today, calculus classes don't teach that, do they? >> >> > Of course no, and there is one good reason for that: most colleagues do > not even know what the Risch algorithm is about. > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
