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How to study for SAT math (and actually fix your mistakes)

Most SAT math prep is doing problems and reading the answer explanations. That feels productive and mostly isn't: the explanation you read is someone else's thinking. The score moves when you find out why you missed each question and fix that reason.

1. Take a real practice test first

Use the official full-length practice tests in the College Board's free Bluebook app. They're adaptive like the real thing (how you do on the first math module decides the second), and they have the same built-in Desmos calculator. Your score now is the starting line, not a verdict.

2. Sort every miss by why, not by topic

• Careless: you knew how, and slipped (a sign, misread the question, answered for x when it asked for 2x).
• Concept: you didn't know the rule or the method.
• Time: you could have done it, but not fast enough.

Each kind has a different fix, and most students only practise the second.

3. Fix each kind its own way

• Careless: before choosing, reread what the question asks for and plug your answer back in. Two habits, most of the points.
• Concept: learn the topic properly once (a short lesson, then a handful of problems on just that), then mix it back in.
• Time: learn the faster route: often Desmos (below), or noticing you don't need to solve fully to pick the answer.

4. Use the built-in Desmos on purpose

It's allowed on every math question, and it's fast for: solving systems (graph both, read the intersection), finding a quadratic's vertex or zeros, and checking an answer you got by hand. Practise with it before test day so you aren't learning it under the clock.

5. Redo, don't reread

A few days after you review a missed question, do it again on blank paper without looking at the explanation. If you can, it's fixed. If you can't, it wasn't, and that's the most useful thing you'll learn all week.

Where theoremEd fits

When you're stuck on a practice question, theoremEd looks at your working, points at the line that went wrong and asks you one question, instead of showing you a finished explanation. It works beside a practice test in Chrome or on a Mac, and it can quiz you on the topics you keep missing. Free to try, no account.