'How did this happen? Public schools in many districts and states are underfunded, unable to meet the mandates imposed by state and federal government, yet business is booming for the edupreneurs! Peter Greene scratches the surface of the exploding education industry, where the big companies swallow the little companies, and it is difficult to identify which conglomerate is in charge. 'Who is buying the junk food?' asks Diane Ravitch former ass't Sec'y Of Education, who watches the privatization of public education .