There is a demand for this kind of thing outside of just high-school. I'm not in a position to go back to high-school or university, but I'd like (and would pay

There is a demand for this kind of thing outside of just high-school. I'm not in a position to go back to high-school or university, but I'd like (and would pay) to be able to "study along" with other people on a course/textbook. (This is partly a lazyweb request - if this exists, someone tell me where!)