A couple of links to upcoming power points. Download them for best results.

Link to Chap 20 Power Point

Link to Chap 21 Power Point

A warning to everyone: DO THE READING AHEAD OF TIME! EXPECT TO SEE STUFF ON THE TEST THAT WE HAVEN'T COVERED IN CLASS!
Why?
Because I want us to get to do some cool stuff while in class, which means covering the material FAST. WE have:
2 days for chapter 20
2 days for chapter 21
2 days for chapter 22
3 days for chapter 23