You could buy the book, which isn't that expensive and covers everything from the video's as far as I can tell. That allows you to study it more at your own pa

You could buy the book, which isn't that expensive and covers everything from the video's as far as I can tell. That allows you to study it more at your own pace. I'm taking the Visualizing Algebra course from Udacity, after working halfway through Coding the Matrix, because I found my algebra skills to be lacking. Too bad its no longer possible to get a certificate on Coursera though, now I have to wait until the next iteration.