What do you think people mean when they say that a school is overcrowded or that class sizes are too large? Why do you think a school becomes overcrowded? What are the benefits or downsides of large class sizes? Why don’t people simply go to another school if their school or classes are too crowded? This guide prompts math teachers to frame geometry learning using big, open-ended driving questions, multimedia resources, and potential projects that are relevant to students’ lives. In addition, the guide offers tips for engaging students with multiple modes of representation and assessment.