Today I studied cryptography and compression, so I'm trucking along. These topics are not on the coaching docs I've seen, but I added them to round out my studies. I'm basically trying to compress a 4 year CS degree into less than 1 year.
It's lossy compression.
Cryptography
Khan Academy has an excellent series on cryptography, and its prerequisite topic, information theory. Links are below.
Some of my notes for your enjoyment:
Compression
I found these great videos by Developer Advocate Colt McAnlis on the Google Developer Youtube channel.
I've embedded the playlist below.
For links to everything I'm studying, check out my project on github: