AP US History Study Guide
All 9 units of the AP US History course, with the topics College Board lists for each and a short summary of what the unit covers.
Units at a glance
| Unit | Exam weighting |
|---|---|
| Unit 1: Period 1: 1491-1607 | 4-6% |
| Unit 2: Period 2: 1607-1754 | 6-8% |
| Unit 3: Period 3: 1754-1800 | 10-17% |
| Unit 4: Period 4: 1800-1848 | 10-17% |
| Unit 5: Period 5: 1844-1877 | 10-17% |
| Unit 6: Period 6: 1865-1898 | 10-17% |
| Unit 7: Period 7: 1890-1945 | 10-17% |
| Unit 8: Period 8: 1945-1980 | 10-17% |
| Unit 9: Period 9: 1980-Present | 4-6% |
Weightings are College Board's ranges for the exam.
Unit 1: Period 1: 1491-1607
4-6% of the exam
This unit starts with the Native American societies that developed across North America before European contact, adapting to and changing their environments through farming, resource use, and social structure. Contact among Europeans, Native Americans, and Africans then led to the Columbian Exchange and to social, cultural, and political change on both sides of the Atlantic, and the Columbian Exchange and the growth of the Spanish Empire brought major demographic, economic, and social change. Europeans and Native Americans also held different views on issues such as religion and land use.
Topics in this unit
- Contextualizing Period 1
- Native American Societies Before European Contact
- European Exploration in the Americas
- Columbian Exchange, Spanish Exploration, and Conquest
- Labor, Slavery, and Caste in the Spanish Colonial System
- Cultural Interactions Between Europeans, Native Americans, and Africans
- Causation in Period 1
Shaky on any of these? Paste your class notes for Unit 1 into the free flashcard maker or the free quiz maker.
Unit 2: Period 2: 1607-1754
6-8% of the exam
Unit 2 covers how European powers colonized North America in different ways, shaped by their imperial goals, their cultures, and the places they settled, and how they competed with each other and with American Indians for resources. You compare the regions of the British colonies and study transatlantic trade and slavery in those colonies. The unit also shows how exchanges with Great Britain built stronger bonds with Britain while also encouraging resistance to its control.
Topics in this unit
- Contextualizing Period 2
- European Colonization
- The Regions of British Colonies
- Transatlantic Trade
- Interactions Between American Indians and Europeans
- Slavery in the British Colonies
- Colonial Society and Culture
- Comparison in Period 2
Shaky on any of these? Paste your class notes for Unit 2 into the free flashcard maker or the free quiz maker.
Unit 3: Period 3: 1754-1800
10-17% of the exam
This unit follows how British attempts to tighten control over the North American colonies ran into colonial determination to govern themselves, leading to an independence movement and the Revolutionary War. The Revolution's democratic and republican ideals then inspired new experiments in government, from the Articles of Confederation to the Constitution and the debates over ratifying it. You also study how migration within North America and competition over resources, boundaries, and trade increased conflict among peoples and nations.
Topics in this unit
- Contextualizing Period 3
- The Seven Years' War (The French and Indian War)
- Taxation Without Representation
- Philosophical Foundations of the American Revolution
- The American Revolution
- The Influence of Revolutionary Ideals
- The Articles of Confederation
- The Constitutional Convention and Debates over Ratification
- The Constitution
- Shaping a New Republic
- Developing an American Identity
- Movement in the Early Republic
- Continuity and Change in Period 3
Shaky on any of these? Paste your class notes for Unit 3 into the free flashcard maker or the free quiz maker.
Unit 4: Period 4: 1800-1848
10-17% of the exam
Unit 4 covers how the United States began to build a modern democracy and a new national culture, while Americans argued over the nation's democratic ideals and tried to reform society to match them. It explains how the market revolution, driven by new technology, agriculture, and commerce, sped up the economy and changed both national and regional identities. It also shows how interest in foreign trade and in expanding the nation's borders shaped U.S. foreign policy.
Topics in this unit
- Contextualizing Period 4
- The Rise of Political Parties and the Era of Jefferson
- Politics and Regional Interests
- America on the World Stage
- Market Revolution: Industrialization
- Market Revolution: Society and Culture
- Expanding Democracy
- Jackson and Federal Power
- The Development of an American Culture
- The Second Great Awakening
- An Age of Reform
- African Americans in the Early Republic
- The Society of the South in the Early Republic
- Causation in Period 4
Shaky on any of these? Paste your class notes for Unit 4 into the free flashcard maker or the free quiz maker.
Unit 5: Period 5: 1844-1877
10-17% of the exam
This unit begins with Manifest Destiny and the Mexican-American War, as the United States pursued an expansionist foreign policy and became a destination for many migrants. It traces how expansion and deepening regional divisions over slavery broke down compromise and led to secession and the Civil War. It ends with Reconstruction: the Union victory settled slavery and secession but left open questions about federal power and citizenship rights.
Topics in this unit
- Contextualizing Period 5
- Manifest Destiny
- The Mexican-American War
- The Compromise of 1850
- Sectional Conflict: Regional Differences
- Failure of Compromise
- Election of 1860 and Secession
- Military Conflict in the Civil War
- Government Policies During the Civil War
- Reconstruction
- Failure of Reconstruction
- Comparison in Period 5
Shaky on any of these? Paste your class notes for Unit 5 into the free flashcard maker or the free quiz maker.
Unit 6: Period 6: 1865-1898
10-17% of the exam
Unit 6 covers the rise of industrial capitalism, encouraged by technological advances, large-scale production, and new markets, and what it meant for workers in the Gilded Age. You study westward expansion and the migrations that came with industrialization, which transformed both cities and rural areas. The unit also covers the new cultural movements, reform efforts, and political debates over economic and social policy that marked the era.
Topics in this unit
- Contextualizing Period 6
- Westward Expansion: Economic Development
- Westward Expansion: Social and Cultural Development
- The "New South"
- Technological Innovation
- The Rise of Industrial Capitalism
- Labor in the Gilded Age
- Immigration and Migration in the Gilded Age
- Responses to Immigration in the Gilded Age
- Development of the Middle Class
- Reform in the Gilded Age
- Controversies over the Role of Government in the Gilded Age
- Politics in the Gilded Age
- Continuity and Change in Period 6
Shaky on any of these? Paste your class notes for Unit 6 into the free flashcard maker or the free quiz maker.
Unit 7: Period 7: 1890-1945
10-17% of the exam
This unit covers how the United States grew into a world power through new territorial acquisitions, the Spanish-American War, and both world wars, while debates over imperialism and the nation's role in the world went on at home. At home, it covers the Progressives, the new mass culture and controversies of the 1920s, and changing migration patterns. The Great Depression and the New Deal show how economic instability led to new efforts to reform American society and its economy.
Topics in this unit
- Contextualizing Period 7
- Imperialism: Debates
- The Spanish-American War
- The Progressives
- World War I: Military and Diplomacy
- World War I: Home Front
- 1920s: Innovations in Communication and Technology
- 1920s: Cultural and Political Controversies
- The Great Depression
- The New Deal
- Interwar Foreign Policy
- World War II: Mobilization
- World War II: Military
- Postwar Diplomacy
- Comparison in Period 7
Shaky on any of these? Paste your class notes for Unit 7 into the free flashcard maker or the free quiz maker.
Unit 8: Period 8: 1945-1980
10-17% of the exam
Unit 8 covers the Cold War, including the Red Scare and the Vietnam War, as the United States worked to hold a position of global leadership with far-reaching effects at home and abroad. It follows the civil rights movement from its early steps in the 1940s and 1950s through the 1960s, along with the Great Society and the political and cultural responses these changes produced. It also shows how postwar economic and demographic change reshaped American society, politics, and culture.
Topics in this unit
- Contextualizing Period 8
- The Cold War from 1945 to 1980
- The Red Scare
- Economy after 1945
- Culture after 1945
- Early Steps in the Civil Rights Movement (1940s and 1950s)
- America as a World Power
- The Vietnam War
- The Great Society
- The African American Civil Rights Movement (1960s)
- The Civil Rights Movement Expands
- Youth Culture of the 1960s
- The Environment and Natural Resources from 1968 to 1980
- Society in Transition
- Continuity and Change in Period 8
Shaky on any of these? Paste your class notes for Unit 8 into the free flashcard maker or the free quiz maker.
Unit 9: Period 9: 1980-Present
4-6% of the exam
The final unit begins with Reagan and a rising conservative movement that reached several of its political and policy goals in the 1980s and stayed influential in later decades. It covers the end of the Cold War and the new challenges that pushed the nation to redefine its foreign policy and role in the world. It also looks at technological and economic change and at migration and immigration in the 1990s and 2000s.
Topics in this unit
- Contextualizing Period 9
- Reagan and Conservatism
- The End of the Cold War
- A Changing Economy
- Migration and Immigration in the 1990s and 2000s
- Challenges of the 21st Century
- Causation in Period 9
Shaky on any of these? Paste your class notes for Unit 9 into the free flashcard maker or the free quiz maker.
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Source
Unit titles, weightings and topics are from College Board's AP U.S. History Course and Exam Description (Fall 2026). The unit summaries are ours. All AP study guides and score calculators.