The Chemistry students saw me turn a penny into gold. Yup, gold. Believe me? You shouldn't. Ever. We also reviewed some conversion calculations from that first worksheet I gave all the students.
The AP Biology saw, for the first time, the AP Biology Exam. We checked out some multiple choice questions which, really, didn't require any special knowledge of biology. If you can interpret a graph or table of data, you'll probably do OK. We also turned in the Osmosis and Diffusion Lab.