I don't think khanacademy is just for high school kids, or elementary or middle school. Everyone will forget, and almost everyone with a high school education or better will have gaps in their knowledge. Everyone seems to think that college is the end of their education, but that's false. As with everything you learn or master, you need to practice them, and khanacademy offers periodic reviews according to the principle of spaced repetition.
So, it's great for adults too, even if they're only in review mode for the vast majority of their life. When they start to learn something more advanced, they don't have to go back to elementary math or deal with the problem of knowledge gaps.
Only the youngest can derive much benefit from it? Absolutely not true.
Is what you said true even if you go into a field, or choose a major, that relies heavily on advanced math? That was what I was trying to get at. If people do much more complicated math on a daily basis, presumably they have already mastered all math topics at a high school level, unless the skills they use are much narrower than that (which, of course, might very well be true).
Hello, I was wondering: how many of you are doing khanacademy?
Right now, I am about 2 weeks away from completing khanacademy altogether. 334 out of 380 concepts are completed, assuming that the KA team don't add any new content during the time period.
Are you guys brushing up your math on KA, and if so what's your progress?