The AP Biology students did practice injections of food coloring into agarose gel. What the heck is that, you ask? Oh, you don't? I thought you were asking. Well, in case you were, the students practiced injecting stuff in the gels to prepare for the real thing with DNA.
The Chemistry students began Part 1 of the Stoichiometry: Making 2.0 Grams of an Ionic Compound. The students worked through some review problems in order to receive their very own reaction upon which to use to prepare those aforementioned 2.0 grams of an ionic compound.