MIT Open Course Ware: Free Online Course Material
"Free lecture notes, exams, and videos from MIT. No registration required."
Personally, I like to learn the course on:
Minds and Machineshttp://ocw.mit.edu/courses/linguistics-and-philosophy/24-09-minds-and-machines-fall-2011/
Course DescriptionThis course is an introduction to many of the central issues in a branch of philosophy called philosophy of mind.
Other course wares are listed too: