Someone at some point may have already posted this somewhere, but just in case here’s a neato tidbit that’s free! Yale, Harvard, MIT & Carnegie Mellon all have open courses you can audit online for free. They include entire semesters of video recorded lectures, downloadable practice tests with answer keys, outlines and the works! Carnegie Mellons Biochem even has a virtual lab! Very very nice tools if you want to check out a subject on your own before you take a class or review…and its free! They can be found by googling “Yale open course” etc. Hope you all think this is as awesome as I do!