I'm building a small lms with drupal

Hello I'm building a small lms with Drupal, it's really simple.

Quiz module to test.
a cck module to lessons.

I make books of lessons and test.

I'm developing a small code to don't let people go to the next lesson if they don't pass the test of the lesson, I build a relationship between test and lessons with node-reference.

Control access to lessons with taxonomy control access.

A modulo to ask a new course and a small workflow of two persons to accept the course.

I hope to finish it this week or the next week.

Thanks

oskar