I'm taking a graduate sequence alg. topology course based on Hatcher and I've already learned point-set topology, groups, and rings. I scanned the first three chapters of Hatcher and saw modules appearing multiple times.
I'm planning on covering enough module theory over the break from Dummit and Foote so that I can comfortably take this course without struggling to make up for my knowledge deficit:
How much of this appears in Hatcher (chap 1-3)? In the interest that I want to do well in this course, should I read chapters 11 and 12 or can I just skip them for now?