I need to work on:

1. computations in D4
2. Right congruence
3. Left congruence
4. Cosets and what they "look like"
5. Quotient groups and what they "look like"
6. Knowing content of Thm 7.8

Questions for class:

1. a sample problem of application (kind of like #5 on last test. You know how we have to apply a thm to something we've never seen before. I'm not asking for the actual problem that will be on the test, but maybe something similar)
2. examples of quotient groups
3. examples of cosets