APUSH CED: What CollegeBoard actually tests, unit by unit

The APUSH Course and Exam Description (CED) is the closest thing you'll get to a sanctioned answer key. It's the document CollegeBoard writes the exam from, and it lays out exactly what content, skills and reasoning practices each of the 9 units expects.

Many students never read it, which is a missed opportunity. The CED tells you what's testable and, just as usefully, what's lower priority. The exam is written to the CED's key concepts, so if your textbook goes deep on something the CED doesn't mention, it's a lower priority for revision. This article walks through what the CED expects in each unit.

The CED splits the course into 9 chronological units, then within each unit lists learning objectives, key concepts and illustrative examples. It also spells out the 6 historical thinking skills (developments and processes, sourcing and situation, claims and evidence in sources, contextualization, making connections, and argumentation) and the 3 reasoning processes (comparison, causation, and continuity and change) that the exam tests alongside content.

Unit weights are published as ranges, not fixed percentages, which gives CollegeBoard some latitude year to year.

Unit 1 is short but foundational. The CED expects you to know about the diversity of Native American societies before contact, the motives and methods of European colonization, the demographic and cultural impacts of the Columbian Exchange, and the labor systems that emerged in Spanish America (encomienda, later chattel slavery).

Low-frequency exam topic, but the CED-listed concepts here regularly seed contextualization points for prompts about Unit 2 and Unit 3.

The CED emphasizes the distinct development of the four colonial regions (New England, Middle, Chesapeake, Southern), the transatlantic economy, the origins of racialized slavery after Bacon's Rebellion, and colonial responses to British authority (from salutary neglect through the First Great Awakening).

Watch: The CED explicitly asks about Enlightenment influence and religious diversity. Both regularly appear in SAQs about colonial ideas.

Heavy weighting (10-17%). The CED expects you to know the causes and course of the American Revolution, the debates around the Articles of Confederation and Constitution, the compromises at the Constitutional Convention, and the political battles of the 1790s (Federalist vs Democratic-Republican, Whiskey Rebellion, Alien and Sedition Acts).

Documents worth recognizing for this unit: Declaration of Independence, Federalist Papers 10 and 51, the Constitution itself, Washington's Farewell Address.

The CED wants you to explain the market and transportation revolutions, the expansion of participatory democracy under Jackson, sectional tensions (Missouri Compromise, nullification crisis), and the range of antebellum reform movements (abolition, women's rights, temperance, education).

Common SAQ angle from Unit 4: How economic change fed either reform or political conflict in the same period.

One of the highest-value units. The CED requires depth on the causes of the Civil War (slavery, expansion, states' rights, sectionalism), turning points of the war, Reconstruction phases (Presidential, Radical, Redemption), the three Reconstruction amendments (13th, 14th, 15th), and the end of Reconstruction with the Compromise of 1877.

This unit often anchors the DBQ. Know the sequence of the 1850s crisis events cold.

The CED covers industrialization, the rise of big business, labor organization and conflict, the New Immigration from Southern and Eastern Europe, the transformation of the West (railroads, Homestead Act, Dawes Act, subjugation of Native nations), urbanization, and the Populist movement.

Don't skip the Populists. The CED expects you to explain how economic instability led agrarian activists to create the People's (Populist) Party, and the Omaha Platform and the 1896 election are strong evidence for that.

This unit spans a lot: Progressive reforms and constitutional amendments (16th through 19th), imperialism and WWI, the 1920s cultural and economic shifts, the Great Depression and New Deal, and WWII. The CED expects you to explain how each era responded to industrial society's pressures.

High-yield: The New Deal's expansion of federal power, and how WWII reshaped US economic and international position.

The CED expects both foreign and domestic depth: Containment policy (Truman Doctrine, Marshall Plan, NATO, Korea, Vietnam), postwar prosperity and suburbanization, the civil rights movement from Brown to the Voting Rights Act, the Great Society, and the social movements of the late 1960s (women, Latino, Native American, environmental).

Common LEQ prompt: Continuity and change in either civil rights or foreign policy across this period.

Light on weight (4-6%). The CED covers the Reagan realignment, the end of the Cold War, immigration and globalization, and the post-9/11 political era. The exam's short-answer questions cover events through 2001, so detailed knowledge of more recent events is less likely to be tested.

Use Unit 9 mainly for continuity arguments and contextualization pointing forward from Unit 8.

Two recurring patterns. First, students over-study familiar units (Revolution, Civil War, civil rights) and under-study Gilded Age and Progressive-era policy detail. The CED weights Units 6 and 7 the same as the more famous units, so they deserve equal prep time. Second, students memorize events without the CED's reasoning practices (causation, comparison, continuity and change). The MCQs and FRQs test the practices explicitly.

A useful move: Print the CED unit list, mark which units you feel weakest on, and spend disproportionate time there. Then practice writing 2-3 sentence responses that name a cause or a comparison, rather than just describing an event.

The CED and the textbook serve different jobs. The textbook narrates history; the CED tells you what will be tested. Reading the textbook without the CED means you may spend hours on material that never appears on the exam. Reading the CED without the textbook means you have the checklist but no depth.

A useful workflow: Before starting a textbook chapter, read the corresponding CED unit's learning objectives (usually 3-5 pages per unit). That tells you what the chapter is really trying to teach. Then read the textbook chapter with those objectives in mind. Finally, close both and try to explain each learning objective in your own words. If you can, you've absorbed what the exam wants. If you can't, that's your revision target for the next session.

The CED also flags which topics are illustrative rather than required. Illustrative examples (specific people, court cases, events listed in the CED) are suggestions of what the exam might test at that level; they're not the only content that could appear. Familiarity with them is useful, but memorizing every illustrative example isn't necessary.