e-learning financial training course using open source platform

We have created powerpoint based content for financial training, with courses in capital markets, accounting and fund management. We would like to put it up on the web and create self paced learning courses online based on this material. Also we would like the website to be able to enroll students and monitor their progress and maintain test results. The site should also contain chat rooms for interactive sessions between teacher and students As we are a start up company in this field with limited resources, we would like to use open source platforms wherever available. Initial target would be to be able to service 50-100 students and see how it goes.