152083 Community script+ mini tests

I need a Community script ( with a nice looking template) installed on my server-something with clean code and bug free - I don't need fancy things like videos, pictures , music but I need the following: - users should be able to form groups and create and take mini-tests (individually) - a mini- test is represented by a succession of 4-7 web pages,every page having these fields: 1- question, 2- answer zone,3- zone that shows the correct answer, 4 - hint zone, 5- comments zone ( where all the users who take that mini- test can save comments - to not be too boring, these mini- test should be eye-catching( Flash or Ajax based) - a user can create and take mini-tests only if he/she is member of that group ( each group has its collection of tests created by its members) - an user can subscribe to a group only if he has a certain type of email address( like school address) That's it! Prefer something in PHP+ Mysql. Please let me know what script you intend to use and example of similar work.