Student Exam/Testing Module

Hello,

I have a client who is requesting an online test-taking application for their Drupal 6.x site. Ultimately, the following features would be necessary.
- Does something like this exist? I'm hoping the answer is yes, or...
- Would this be custom work?
- Would other existing modules be required (requirement #2 below makes me think that another module might be needed...something to manage groups of users)?

Thanks very much for taking the time to read this and offering suggestions. I appreciate it.

REQUIREMENTS:

1. The ability for a student to log into the site (after creating an account) and take a test. There would probably only be one test each year. This test would be designed by the site admin, so the ability to create the questions is also required.

2. The ability for teachers to log into the site and see the test scores (just the student name, student "ID", and the score) for only those students attending the teacher's school (the teacher is the "sponsor" for all students in his/her school). I'm assuming that we would need a way to tie a teacher and a student to a school ID code. These school IDs already exist. A text field in the user account, maybe?

3. The ability for the client to create the test(s) each year. (See #1 above.)

4. The ability for a anyone viewing scores to sort them by school code, student name, and student score (the highest 500 scores will be chosen for something so the administrator would need to be able to get this list of names).

5. It would also be nice to be able to export the entire list of scores, student names, etc as comma-separated values.

6. The ability for a site admin to view all the scores and export them all as CSV.

7. Views integration of the scores/results, along with student names, would be nice, but it's not a requirement so long as the module can actually do all of the above tricks.