I posted a comment there but it never showed up, I guess because it had some links in it. I mainly recommended reading some educational research that could hel

I posted a comment there but it never showed up, I guess because it had some links in it. I mainly recommended reading some educational research that could help improve the khan academy's work. Especially research in math education. See for example a report by Harold Wenglinsky called 'Does It Compute?" that found much better learning gains when kids did exploratory math activities and simulations and spreadsheets and so forth. When they did drill activities, their performance actually decreased. http://www.ets.org/Media/Research/pdf/PICTECHNOLOG.pdf http://www.ets.org/Media/Research/pdf/PICTECHNOLOG.pdf Then there are these two books (which are free online), the first of which I'd recommend everyone interested in creating educational activities read: How People Learn http://www.nap.edu/catalog.php?record_id=9853 http://www.nap.edu/catalog.php?record_id=9853 How Students Learn http://www.nap.edu/catalog.php?record_id=10126 http://www.nap.edu/catalog.php?record_id=10126 In math, it helps to use gestures and embodied analogies and representations of many concepts. In other areas like science and history that helps, too, but also students have a lot of strongly persistent misconceptions that have to be brought out into the open in your videos or text, plus it helps to have supplementary constructivist learning activities like simulations, games, and modeling/design tools (including programming).