I posted about this a while ago and included a list of suggested exercises and videos in a pdf. Since then I’ve revised and updated the list and you can find it here: GMAT Prep with Khan Academy It’s bigger and better and includes a lot of important stuff I missed the first time.
However, one of the major pitfalls of this approach is that students aren’t very familiar with Khan Academy. It takes a little know-how to get the most out of it. I’m going to fix this with this video