e-learning online module plugin

Does any one know of an e-learning plug-in for wordpress. I have tried a number of quiz modules as well as questionnaire plug-ins. What I am looking for is a plug-in that will

1. Allow admin to create a quiz with multiple questions some being true and false, others being best out of 5 etc.
2. Allow media to be inserted pictures, video, sound, links etc.
3. Have pre-set scores for right and wrong answers and a page showing results at the end.
4. Results are emailed to a designated course provider with the users name and email address.
5. You can restrict the number of times a user can d the test and record their attempts
6. You can restrict the test to registered users or a group of registered users. Or even better invite people by emailing them.

Any help would be appreciated.