People are likely aware of this already but I felt the need to share the link.
The Massachusetts Institute of Technology (MIT) offers 1800 courses free on their OpenCourseWare
Lecture notes, audio and course text have been included with the ones I've completed. A few I've browsed have a bit of video as well. You're not earning credits but for those like myself unable to afford to continue college, yet still love learning, it's an amazing resource. Explore something you've never considered, take that forensics class you never got around too...it's there to be used!