Digital SAT® exam · Math + Reading & Writing

Every SAT® topic.
One rule at a time.

Each topic on the digital SAT exam comes down to one rule. Learn the rule, watch it work on example after example, then learn the traps the test sets for you.

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45 topicsFree on YouTubeIndependent & original
THE RULE
SAT Math · Linear equations
Simplify to  ax + b = cx + d
a ≠ cexactly one solution
a = c, b ≠ dno solution
a = c, b = dinfinitely many
One rule. Seven examples. Every linear equation on the test.
How it works

Rule. Examples. Traps.

Every topic gets the same three-part treatment, so you always know what's coming.

1

The rule

One short rule that covers the whole topic, shown on a single card you can screenshot and review.

2

Seven examples

SAT-style questions, animated step by step, until applying the rule is automatic.

3

Shortcuts & traps

The hard versions, and the exact mistakes the wrong answer choices are waiting for.

Try one now

Use the rule. Five seconds.

This is the practice question from the end of the linear equations lesson.

SAT MathStudent-produced response

The equation below has infinitely many solutions. What is the value of k?

2(x + 3) = 2x + k
  1. Expand the left side: 2x + 6 = 2x + k
  2. The x terms already match (2 = 2).
  3. Infinitely many solutions means the constants match too: k = 6
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Get the full linear equations practice set, free.

The rule card, ten SAT-style questions, and a worked answer for each one. Sent straight to your inbox.

SAT Linear Equations: one rule plus seven examples
Lesson 1 · Out now

SAT Linear Equations: Solve Any of Them

The rule, then seven examples. Distribute, clear fractions, find an expression without solving for x, and spot no-solution and infinite-solution questions instantly.

  • → New topic every 3–4 days
  • → Math and Reading & Writing alternate
  • → All topics out before the May 2027 test date
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Free practice

More practice, free.

Join the list and get a printable practice set for every new topic as it comes out, starting with linear equations.

  • The rule card for each topic
  • 10 SAT-style questions per set, with worked answers
  • The traps to watch for, flagged
  • Reminders before each SAT test date
The roadmap

Every topic, in order.

A new topic every few days, all of them out before the May 2027 test date. Green means it's live now.

For parents

Clear, calm, and free.

Covers the whole test

Every Math and Reading & Writing topic on the digital SAT exam, plus strategy for pacing, guessing and test week.

Short and focused

Lessons run 7–10 minutes. One rule per topic, so your student knows exactly what to review.

Practice that sticks

Free practice for each topic on this site, with a worked answer for every question.