Before today's class you should read Moons and Planets, pp. 257-267. These sections are about planetary stratigraphy and crater counting as a method of dating. Note the summary list of concepts on pp. 267-268.
Before today's class you should read Moons and Planets, pp. 271-284. These sections are about volcanism and volcanic landforms. Study the pictures! There are great ones in this chapter!
The lab today is on impact cratering.
Before today's class you should read Moons and Planets, pp. 284-294. These sections review additional processes that affect the development of planetary surfaces.