It's not like Sal Khan was the first to say lectures are an ineffective way of learning. For example the "How people learn" report by the National Academies fro

It's not like Sal Khan was the first to say lectures are an ineffective way of learning. For example the "How people learn" report by the National Academies from 2000 (http://www.nap.edu/catalog.php?record_id=9853 http://www.nap.edu/catalog.php?record_id=9853) is a very good overview for those new to the subject.