Free Online University Courseware & Video Lectures

"..I started out as an economics major and then switched to mathematics. I loved math, but I wasn’t sure that I wanted to spend my life being a mathematician. I thought for a while about studying psychology and I even considered the possibility of studying law. I’m not sure what I would have gotten a degree in if I hadn’t left Harvard to start Microsoft before I graduated." - Bill Gates

The website of Bill Gates interestingly has a section "What I'm Learning". In a posting under that, the billionaire-philanthropist-geek says that he likes viewing courses online from MIT’s OpenCourseware, Academic Earth among others. For those fond of learning continually, there is no dearth of material on the Web -

• Academic Earth
• MIT’s OpenCourseware
• Carnegie Mellon's Open Learning Initiative
• The Open University, UK
• University of California, Berkeley
• Khan Academy
• Stanford Courses on iTunes U (Apple iTunes is a freely downloadable software. There is currently a course on iPhone Application Development)

Related -
Project Tuva - interactive educational video application from Microsoft Research