APUSH units: All 9 periods, exam weightings, and where to focus

APUSH (AP US History) is built around 9 chronological periods, from pre-Columbian contact through the present. The College Board publishes an exam weighting range for each period in the CED (Course and Exam Description), and the weightings aren't equal. Periods 3 through 8 dominate the exam; Periods 1 and 9 carry much less weight (4-6% each).

That matters because if you split your study time evenly across periods, you may over-prepare for the lightly weighted periods and under-prepare for the heavier middle of the course. This guide covers all 9 units with weighting, what they cover, and where to focus your revision.

Covers Native American societies before European contact, the Columbian Exchange, Spanish colonization, and early cultural interactions. The exam weighting is small, but Period 1 concepts (encomienda, the casta system, the Columbian Exchange) show up in longer essays that stretch across multiple periods. Common mistake: Assuming Native American societies were homogeneous. The CED emphasizes regional variation (Pueblo, Iroquois, Mississippian, Pacific Northwest).

Covers the founding of the 13 colonies, regional differences (New England, Middle, Chesapeake, Southern), the growth of slavery, the Great Awakening, and salutary neglect. Common mistake: Blurring the four colonial regions. The exam rewards students who can distinguish New England Puritan town governance from Chesapeake tobacco plantation society.

Covers the French and Indian War, Revolutionary War, Articles of Confederation, Constitution, Federalist and Anti-Federalist debates, Washington's presidency, and early political parties. Heavily weighted and heavily documented, so it's a strong candidate for DBQ (Document-Based Question) source material. Common mistake: Confusing the Articles of Confederation with the Constitution. Know why the Articles failed and what specifically the Constitution changed.

Covers Jeffersonian democracy, the Market Revolution, Jacksonian democracy, the Second Great Awakening, abolition and women's rights movements, and westward expansion. The reform movements are exam gold because they combine social, political, and cultural analysis in one topic. Common mistake: Treating Jacksonian democracy as straightforwardly progressive. The exam wants you to weigh Indian Removal, the spoils system, and the extension of white male suffrage together.

Covers Manifest Destiny, sectional tensions, the Civil War, and Reconstruction. Includes the Compromise of 1850, Kansas-Nebraska Act, Dred Scott, Lincoln's presidency, the war itself, the 13th, 14th, and 15th Amendments, and the end of Reconstruction. Common mistake: Rushing through Reconstruction. Its failures set up the Jim Crow system that took hold in Period 6 and shaped the civil rights struggles of later periods.

Covers industrialization, the transcontinental railroad, robber barons and captains of industry, labor unions, Populism, immigration and nativism, urbanization, and the closing of the frontier. This period pairs naturally with Period 7 in comparison questions on economic change. Common mistake: Memorizing tycoons (Carnegie, Rockefeller, Vanderbilt) without being able to explain vertical vs horizontal integration or how the government responded (Sherman Antitrust, Interstate Commerce).

Covers the Progressive Era, Spanish-American War and imperialism, WWI, the 1920s, the Great Depression, the New Deal, and WWII. This is one of the most content-dense periods on the exam. Common mistake: Compressing the New Deal into a single event. The exam distinguishes First New Deal (relief and recovery, 1933-34) from Second New Deal (reform, 1935-38) and expects you to know at least a handful of programs from each.

Covers the Cold War (containment, Korea, Vietnam, McCarthyism), the civil rights movement, the Great Society, feminism, the counterculture, Watergate, and stagflation. Modern-history questions tend to concentrate here because there's ample primary source material. Common mistake: Reducing the civil rights movement to Martin Luther King Jr. and Rosa Parks. The exam rewards knowledge of SNCC, SCLC, CORE, Malcolm X, the Black Panthers, and the movement's shift after 1965.

Covers Reaganism, the end of the Cold War, globalization, 9/11, the 2008 financial crisis, and modern political polarization. The smallest weighting on the exam. Common mistake: Skipping it entirely. It's still worth 4-6% of the exam, the equivalent of roughly 2-3 of the 55 multiple-choice questions, and it can also feature in free-response questions that reach into the 1980s and 1990s.

If you have 10 weeks to revise, a defensible breakdown is: 1 week each on Periods 3, 4, 5, 6, 7, and 8 (that's roughly 80-86% of the exam), half a week each on Periods 1, 2, and 9, and the final 2 weeks on timed DBQ, LEQ (Long Essay Question), and SAQ (Short Answer Question) practice.

The College Board also lists 8 themes that cut across all periods: American and National Identity, Work Exchange and Technology, Geography and the Environment, Migration and Settlement, Politics and Power, America in the World, American and Regional Culture, and Social Structures. DBQs and LEQs are usually framed around these themes, so once you've covered the content, review by theme instead of by period for the last week. That's how you'll answer a prompt like "evaluate the extent to which migration reshaped the American economy between 1865 and 1945" without going blank.

Cognito's APUSH course walks each of the 9 periods with short lessons, review questions, and past FRQ prompts. The AP hub also covers World History and European History if you're stacking history APs.