Perfect competition vs. monopoly — the comparative analysis at the heart of every FRQ.

AP Microeconomics rewards students who can draw and label the four firm-level graphs (perfect competition long-run, perfect competition short-run, monopoly, monopolistic competition) with the correct shaded regions for profit, deadweight loss, and consumer/producer surplus. Almost every long FRQ is a variation on these four diagrams.

Our practice library focuses on the elasticity / tax-incidence family of questions, which has appeared on every recent exam and asks students to predict who bears more of a tax based on relative elasticities — a topic many students learn definitionally but never see modeled to scoring rubric standards.