My first thought upon reading that quotation was "Says who?" If schools don't teach anything, then we should not let doctors treat us if we become ill. That would mean the person on the other end of the scalpel doesn't know any more about removing an appendix than the patient! I think perhaps the main point here is that the view expressed in the quotation is a gross exaggeration. There are complaints from many quarters that schools, especially in the U.S., teach too much by rote memorization and not enough through discovery; however, that's a long way from saying that schools "don't really teach anything."
Interesting subject! :-)