This is a set of animal behavior investigations in which students will practice scientific inquiry as they observe crayfish, ask questions, and discuss territoriality, social interactions, and other behaviors, in doing this, they hone their skills of observation, learn to record and analyze data, control for variables, write hypotheses, make tentative conclusions, and then design and carry out original experiments. This set of activities and experiments is designed for middle school through high school life science or biology classrooms.