[_nist]

Yes, lets just perpetuate mistakes in perpetuity. And I highly doubt everyone would end up with the same misconceptions. However, the fact that Khan Academy is a) not rigorous, b) has no type of human interface with the teacher, c) has no type of input from professors and lead academic institutions, d) is purported as an educational savior by influential people when there is no such thing, e) uses outdated and confusing teaching techniques, f) has yet to put problems over exercises, and g) has no type of human interface between students it has a long LONG way to go.