Study Guides

Overview
The following have been listed as quality resources when studying for various CLEPs, DSSTs, or other alternative credit sources.

Generally Useful Sources

 * iTunes U for (some) entire course lectures (video and/or audio)
 * OpenCourseWare (some overlap with iTunes U)
 * Free CLEP Prep for advice on preparing for CLEP/DSST/etc tests and study guide sources

Math

 * Khan Academy -- 2000+ free videos on many topics, mostly math, grade school through linear algebra
 * PatrickJMT -- similar to Khan Academy
 * /r/learnmath subreddit -- "Here, there are no stupid questions asked, only stupid people who don't ask questions."
 * West Texas A&M's Virtual Math Lab -- thorough explanations of College Algebra topics