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Learn how to be an AP Reader (the people who grade the exams)! We will look at the test format so you know what resources you have available and grade a sample student submission. If you know what AP Readers are looking for as you compose your response, then you should be able to make sure you have all necessary parts and won't lose points for leaving things out and/or won't lose time for writing too much.
We will look at this problem: Researchers are investigating the effectiveness of using a fungus to control the spread of an insect that destroys trees. The researchers will create four different concentrations of fungus mixtures: 0 milliliters per liter (ml/L), 1.25 ml/L, 2.5 ml/L, and 3.75 ml/L. An equal number of the insects will be placed into 20 individual containers. The group of insects in each container will be sprayed with one of the four mixtures, and the researchers will record the number of insects that are still alive in each container one week after spraying.