> I want to know why we don't just go out and see, on actual students, what actually makes them better at understanding and being able to solve problems. Try di

> I want to know why we don't just go out and see, on actual students, what actually makes them better at understanding and being able to solve problems. Try different things and see what works. Review video tapes. Give before and after tests, and focus groups, and see what the people in the class learn the most from. Probably because parents don't want their kids to be one on the receiving end of an experimental technique that doesn't work and sets back their child's learning and development by an unknown amount.