Sorry about the missing reference. I was thinking of (a) classroom clickers, (b) poll everywhere, which as you point out is limited to polls, and (c) UW CP's st

Sorry about the missing reference. I was thinking of (a) classroom clickers, (b) poll everywhere, which as you point out is limited to polls, and (c) UW CP's student feature, which allows more interactivity but requires students to install the UW CP client on a laptop or tablet. Big picture, I'm sure you are right that there is a lot of unexplored/unexploited classroom tech that could leverage smartphones and sms for better collaborative and interactive work. Incidentally, if you are looking for powerpoint export, the best way I found was to basically to export each slide as an image, including every animation step. Pathetic, slow, but mostly reliable.