The Rubric Uses These Words Without Defining Them
Open the DBQ rubric or LEQ rubric and you'll see words like contextualization, corroboration, and complexity used as if you already know exactly what they mean. The College Board's rubrics tell you a skill is required -- they don't teach you how to produce it under timed conditions.
This page defines the 8 skills behind those words in plain English, one at a time, with the exact rubric point each one earns and a real example. Use it as a reference alongside the Thesis Formula and ACE Method guides.
How the 8 Skills Group Together
The 8 skills fall into 3 functional groups, depending on what job they do in your essay.
The Full Glossary: All 8 Skills
| Skill | Plain-English Definition | Rubric Point It Earns | Example |
|---|---|---|---|
| Contextualization | Explaining the broader situation surrounding your topic before you argue about it. | Contextualization (DBQ & LEQ, 1 pt) | Before arguing about the causes of the Civil War, briefly explaining the decades of sectional tension over slavery's expansion that preceded it. |
| Sourcing (HIPP) | Analyzing a document's Historical situation, Intended audience, Purpose, or Point of view. | Sourcing (DBQ, 1 pt) | Noting that a politician's speech defending tariffs was written for voters in an industrial state, which explains its one-sided framing. |
| Comparison | Explaining meaningful similarities and differences between two developments, and why they matter. | Reasoning/Argumentation (LEQ, comparison prompts) | Arguing that Northern and Southern responses to industrialization differed because of their different labor systems, not just that they "were different." |
| Causation | Explaining why something happened and tracing effects, not just describing what happened. | Reasoning/Argumentation (LEQ, causation prompts) | Arguing that the Great Depression caused the New Deal by creating political pressure for federal economic intervention. |
| Continuity & Change (CCOT) | Identifying what stayed the same and what changed across a time period, and explaining the significance of both. | Reasoning/Argumentation (LEQ, CCOT prompts) | Arguing that women's political participation expanded after 1920, while their economic roles changed more slowly. |
| Corroboration | Using multiple sources together, noting where they agree or conflict, to build a stronger argument than any one source could alone. | Evidence & Complexity (DBQ) | Pairing a factory owner's account of working conditions with a labor organizer's account to show the same conditions from two angles. |
| Synthesis | Connecting your specific argument to a different time period, place, or context -- including the present. | Complexity (DBQ & LEQ, 1 pt) | Connecting a DBQ argument about 1920s immigration restriction to debates over immigration policy today. |
| Periodization | Understanding that the dividing lines historians draw between eras are debatable choices, not fixed facts. | Complexity (DBQ & LEQ, supports nuanced arguments) | Noting that "the 1950s" as a decade of conformity oversimplifies a period that also saw the early Civil Rights Movement building momentum. |
Putting These Skills to Work
- You don't need all 8 in every essay. The SAQ typically only needs 1-2 of these skills per part; the DBQ and LEQ ask for more, since they're scored on the full rubric.
- Complexity is the hardest point on purpose. It requires genuinely connecting ideas (synthesis) or weighing multiple sources against each other (corroboration) -- not just adding an extra sentence at the end.
- Practice naming the skill you're using. While writing a practice essay, pause and label which skill each sentence demonstrates. If you can't name one, that paragraph is probably pure content summary -- see Thesis Formula for how to build an argument these skills can attach to.
Frequently Asked Questions
What are the APUSH historical thinking skills?
They're the analytical skills the College Board's AP US History framework is built around -- contextualization, sourcing (HIPP), comparison, causation, continuity and change over time, corroboration, synthesis, and periodization. Every DBQ, LEQ, and SAQ rubric point rewards one of these skills, not just content knowledge.
What is the difference between synthesis and complexity in APUSH?
Synthesis is a specific way of earning the complexity point: connecting your argument to a different time period, geographic area, or historical context (including the present). Complexity is the broader rubric category -- you can also earn it through corroboration across sources, or by exploring counterarguments and qualifications. Synthesis is one path to the complexity point, not a synonym for it.
Why do I need to know these terms if the rubric already explains the points?
The official rubric language assumes you already know what contextualization or corroboration means -- it tells you that you need it, not how to do it. Knowing the actual skill behind the word is what lets you produce it on demand during a timed essay, instead of recognizing it only when a grader points it out afterward.
A Note on This Page
These definitions are adapted for plain-English clarity from the official AP US History Course and Exam Description's historical reasoning skills. Always cross-check rubric-specific wording directly on AP Central.
About the Author
This page and the APUSH score calculator are created and maintained by Rohit Chauhan, focused on turning complex AP scoring rules into clear, practical strategies for students.
Last updated: September 2026 • Have suggestions or corrections? Visit our Contact Us page.