It seems that they are serving the wrong customers. Most edu startups try to sell to parents, teachers, or administrators. Sell directly to the student. Thats one reason I think Khan Academy is having such success.

What I would like a startup to offer me is this: Buy my product/service, invest your time and energy as well as you can learning the subject, and in return we will make you as employable as humanly possible.

Maybe work backwards from that. Just my 2 cents.