CrashCourse is an educational YouTube channel founded by the vlogbrothers that makes crash courses on many different subjects. A lot of these courses are based off of university course or AP course material. Below is a list of all the courses they have so far. Hope you get something useful out of these! I enjoyed the world history and economics courses. In case this page gets out of date, here is the up-to-date playlist section on the CrashCourse channel.