Open the book. Pick a subject. Get to work.
Hundreds of practice questions for AP, SAT, and ACT — full written explanations, organized by unit, aligned to this year's Course & Exam Description. No login. Always free.
AP — 26 subjects
see all →SAT — 2 subjects
see all →ACT — 4 subjects
see all →How it works
Test Practice Hubis a free, ad-supported study library — not a course and not a paywall. Everything is built around one loop: a real question, the correct answer, and a clear explanation of why. Here's how a study session goes.
Pick a subject and unit
Browse AP, SAT, or ACT, then drill into the exact unit you're shaky on — questions are tagged to the current Course & Exam Description, so a unit means what the exam says it means.
Answer real practice questions
Work timed full-length forms or short unit sets. There's no account and no paywall, and your progress is saved anonymously in your browser so you can stop and come back.
Read the worked explanation
After each question, read why the right answer is right — and why each wrong choice is a trap. Every unit also has a worked-solutions page you can study straight through.
Want the longer story on who makes these and how they're checked? Read about the site or browse the FAQ.
Always to spec
Tagged against the latest CED — including the new AP Physics 1 Fluids unit. Old questions stay marked, never silently shown as current.
Worked solutions
Every question has a written explanation, plus a rationale for each wrong choice. Like a tutor in the margin.
Pick up where you left
Anonymous progress in your browser. Streaks if you want them, no harassment if you don't.
Test Practice Hub — free, always.