[userbinator]

I don't know if any courses have referenced it yet, but I think C4 (https://news.ycombinator.com/item?id=8558822) and C4x86 (https://news.ycombinator.com/item?id=8746054) would make for a great semester's worth of study; it's a tiny, self-compiling C-subset compiler that would probably make a good base for further exercises in extending it.