While I like the idea of Khan Academy, there are problems with some of the contents of the lessons. For example, the lesson on Hooke's Law definitely has issues

While I like the idea of Khan Academy, there are problems with some of the contents of the lessons. For example, the lesson on Hooke's Law definitely has issues: http://www.leancrew.com/all-this/2012/12/khan/ http://www.leancrew.com/all-this/2012/12/khan/