The Chemistry students reviewed the basics of stoichiometry calculations. It takes a little practice but most students are starting to get it. We went over the Apollo 13 problem and several other problems which were equally compelling.
The AP Biology students learned the difference between leading and lagging strands of DNA replication. When you're at the Thanksgiving dinner table, say this right when Uncle Frank starts in about the time he met Clint Eastwood in an airport, "'Cuse me Uncle Frank, but you guys should hear about leading and lagging strands that can be found during DNA replication." Your whole family will love you for your knowledge of molecular biology.