Everyone can be an expert! After finishing Wendelin Van Draanen's book Flipped, divide your class into small groups. Then, assign each group a topic to become experts on. The resource suggests topics such as characters, themes, setting, conflicts, and plot. After giving groups 20-25 minutes to gather facts on their topic, each gets to assume the role of the professor, and classmates ask challenging questions (which you might want to brainstorm or help them brainstorm in advance).