MIT OpenCourseWare (OCW) is a web-based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity.
For example, check out 12.003 Atmosphere, Ocean and Climate Dynamics. This undergraduate class is designed to introduce students to the physics that govern the circulation of the ocean and atmosphere. The focus of the course is on the processes that control the climate of the planet. The course includes interactive simulations and videos.
Check it out: http://ocw.mit.edu/OcwWeb/web/home/home/index.htm