Online Ground School / Written Endorsement

Having just written a website for ham radio "study it yourself and pass the
exam", it struck me that such a website for aviation ground school might be
a good thing. ( www.rstengineering.com/hamradio )

I'm thinking of basing it on the Gleim Exam Study Guide and charging a
nominal fee ($10 or so) which includes an endorsement for the private
written exam IF the student can pass my final exam with a score of 90 or
better. No, I don't believe in exams where 70 is passing, no matter what
the FAA says.

Before doing a hell of a lot of work, has this already been done?
Adequately?

Comments on the thought appreciated either in this ng or by email


Jim