Practice the moves behind better history.
Short, evidence-first tools for students who need to see how historical reasoning works—not just read another list of rubric rules.
A growing library of skill-first history practice.
The first collection focuses on AP U.S. History DBQ reasoning, using a Gilded Age case bank developed for a full classroom DBQ experience.
AP U.S. History
Course-level skill guidance, topic routes, and tools for evidence-based writing.
Open the APUSH lab → 02Understand the DBQ
See what each rubric category asks a writer to do and where near-miss answers break down.
Read the guide → 03Practice scoring
Judge eight Gilded Age excerpts, explain the controlling rule, and get a small practice snapshot.
Launch DBQ Decoder →No black-box grading.
The first diagnostic uses a fixed, teacher-authored case bank and deterministic rules. It does not send student writing to an AI provider and does not claim to predict an official AP score.
Written and reviewed by Josh, classroom history teacher and Simulation Lab creator. Last reviewed July 27, 2026. Rubric language is instructional and is not affiliated with or endorsed by the College Board.