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36 free practice questions a day, shared across all your practice, each with a full explanation. No card needed.

Digital SAT®

  • Reading and Writing and Math practice by domain, skill and difficulty
  • Two free full-length tests on official timing: Test A and Challenge Test 1
  • The Daily, 1,023 vocabulary words and practice games

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  • English, Math, Reading and Science practice by category and skill
  • A free full-length practice test with the real section timing
  • Duels with friends and a Summit Sprint to test day

Not sure which test? Compare the SAT and ACT

Questions, answered

36 practice questions every day, each with a full explanation, shared across your SAT, ACT and AP practice. The SAT and ACT diagnostics, SAT full-length Test A and Challenge Test 1, ACT Practice Test 1, The Daily and all 1,023 SAT vocabulary words are free too. No card needed.

The digital SAT, the ACT and AP exams. Choose a test at the top of this page. The ACT side has English, Math, Reading and Science practice, lessons, a 20-question diagnostic and full-length practice tests. The AP side has practice by unit and topic and full-length practice exams. Every question is original.

ACT and AP practice use the same free daily questions as SAT practice. The 20-question ACT diagnostic and ACT Practice Test 1 are free too. Other ACT practice tests and the AP practice exams come with Pro.

Every day at midnight Central Time.

No. Peakscor is an independent practice tool, not affiliated with College Board or ACT Education Corp. Scores shown are estimates.

Digital SAT® practice

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Take the free diagnostic
Start here: 20 questions, about 28 minutes. You see your level in every domain and which lessons to take first. Free, no card. You also get 36 practice questions a day: 9 easy, 9 medium, 9 hard and 9 challenging. See what’s free
The DailySTEP 1
  • Three hearts. A miss costs one. Free: one run every 24 hours.
  • Streaks pay. ×2 from three in a row, ×3 from six.
  • Your best run. Most right before three misses.

Full-length tests

Test day, rehearsed.

98 questions across four modules, in the same order and on the same timing as the digital SAT, with a highlighter, a question map and a timer you can see.

A Peakscor full-length test in progress: Reading and Writing, Test A, Module 1 of 4, question 7 of 27, with the passage, four answer choices, a highlighter, a 24:18 timer and Flag, Back and Next buttons.

How it works

A quick run every day. One skill at a time.

  1. 1

    Play the Daily.

    A quick run with three hearts. String right answers together and the questions get harder and the points multiply.

  2. 2

    Miss one, learn why.

    Every question is tagged by domain and skill, and every answer comes with an explanation.

  3. 3

    Drill that skill.

    Practice any single skill at any difficulty, or just the questions you got wrong.

  4. 4

    Beat your best.

    Come back tomorrow and climb. Progress shows your accuracy and your strongest skills.

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Every question is tagged by section, domain, skill and difficulty, so you can practice exactly what you need. Full tests run like test day: two Reading & Writing modules, a break, then two Math modules.

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MathProblem-Solving and Data AnalysisHard

A store raises the price of a jacket by 20%. Later, it lowers the new price by 20%. The final price is what percent of the original price?

A80%
B96%Correct
C100%The trap
D104%

Check with $100: $100then$120then$96

  1. Turn each change into a multiplier.

    Up 20% means × 1.20. Down 20% means × 0.80.

  2. Apply them in order.

    1.20 × 0.80 = 0.96

  3. Read the answer.

    The final price is 96% of the original. That’s B.

  4. Why not 100%?

    The 20% cut is taken from the higher price, so it removes more than the 20% increase added.

Test day

What test day looks like.

Every Peakscor full test follows this order. In the standard tests, the second module of each section adapts to how you did on the first.

  1. Reading & Writing · Module 1

    27 questions32 min

  2. Reading & Writing · Module 2

    27 questions32 min

    Adapts to how you did on Module 1.
  3. Break

    10 min

  4. Math · Module 1

    22 questions35 min

  5. Math · Module 2

    22 questions35 min

    Adapts to how you did on Module 1.

98 questions · 2 hr 14 min of testing, plus the break

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Start free daily practice

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FAQ

Questions, answered.

The Daily, plus 36 practice questions every day: 9 easy, 9 medium, 9 hard and 9 challenging, each with a full explanation. Full-length Test A, Challenge Test 1 and all 1,023 vocabulary words are free too, as are the 20-question diagnostic and PEAK Survivor’s first map. No card needed.

Pro is $20 a month or $200 a year: unlimited practice with no daily limit, plus every full-length test and Challenge test, and every game map and level. Peak is $29 a month or $280 a year: everything in Pro, plus the full Learn course and Peak Plan. Cancel anytime from your account.

98 questions across four modules, in the same order as the digital SAT: Reading & Writing Module 1 and Module 2 (27 questions each), a 10-minute break, then Math Module 1 and Module 2 (22 questions each). On official timing that’s 2 hr 14 min of testing. You get estimated section scores and a total at the end.

Yes. In the standard full-length tests, Module 2 of each section is the harder version if you get 60% or more of Module 1 right, and the easier version if you don’t. Challenge tests are built from harder material in every module.

Official timing, extended 1.5× time, or untimed, on every test, including the free ones. Extended time allows 48 minutes for each Reading & Writing module and about 52 for each Math module. Untimed removes the clock so you can focus on accuracy.

A quick run with three hearts. Each right answer builds your streak: the questions get harder as it grows, and your points multiply (×2 from three in a row, ×3 from six). A miss costs a heart and drops you back to easy. Best is your longest streak.

Every day at midnight Central Time. You get a fresh 9 easy, 9 medium, 9 hard and 9 challenging.

No. Peakscor is an independent SAT practice tool, not affiliated with the College Board. Scores shown are estimates.

Your next point starts today.

Free, no card.

Sentence Structure · Lesson 1

Fragments, run-ons, and comma splices

An independent clause has a subject and a main verb and can stand alone as a sentence: The library opened a seed exchange. A fragment is a group of words punctuated as a sentence that is missing one of those parts, or that begins with a word such as because, although, or which that makes it depend on another clause: Which allows visitors to trade seeds.

When two independent clauses meet, they need a proper joint. A run-on (fused sentence) puts them side by side with nothing between them. A comma splice joins them with only a comma. Both are errors in the standard written English the ACT tests.

There are several correct ways to join two independent clauses. Learn them, because the right answer is usually one of these and the wrong answers are usually a comma splice, a fused sentence, or a new fragment.

Correct ways to handle two independent clauses
MethodExample
Period: two sentencesThe idea caught on. Hundreds of people joined.
SemicolonThe idea caught on; hundreds of people joined.
Comma plus and, but, or, nor, for, so, or yetThe idea caught on, and hundreds of people joined.
Make one clause depend on the otherBecause the idea caught on, hundreds of people joined.
Semicolon plus a word such as however or thereforeThe idea caught on; however, few people joined at first.

Worked example Easy

Volunteers at the Riverside Library started a seed exchange last spring. Visitors bring packets of seeds from their own gardens and take home new varieties to try. The idea caught on quickly, more than two hundred people traded seeds in the first month alone.

Which choice is correct?

  1. NO CHANGE
  2. quickly; moreAnswer
  3. quickly more
  4. quickly, which more

How to solve it

  1. Find the clauses on each side of the underline. The idea caught on quickly has a subject and verb. More than two hundred people traded seeds in the first month alone does too. That is two independent clauses.
  2. Two independent clauses need a period, a semicolon, or a comma plus and, but, so (and the like). A comma alone is a splice; nothing at all is a fused sentence.
  3. Only B uses a correct joint, the semicolon. Choice D adds a word but breaks the grammar instead of fixing it.

Why each choice is right or wrong

  • A. Incorrect. NO CHANGE keeps only a comma after quickly, which joins two independent clauses with just a comma: a comma splice.
  • B. Correct. A semicolon can join two independent clauses: The idea caught on quickly; more than two hundred people traded seeds in the first month alone.
  • C. Incorrect. With no punctuation after quickly, the two clauses run together as a fused sentence.
  • D. Incorrect. Adding which makes the second part a broken relative clause; in which more than two hundred people traded seeds, the word which has no role, so the sentence no longer works.

Worked example Medium

The small wooden boats that fishers in the village have built by hand for generations, each one painted in bright stripes of blue and yellow, lining the harbor every morning before dawn. By noon most of them have already returned with the day's catch.

Which choice is correct?

  1. NO CHANGE
  2. having lined
  3. which line
  4. lineAnswer

How to solve it

  1. Strip the sentence to its core. The subject is The small wooden boats. That fishers in the village have built by hand for generations describes them, and so does each one painted in bright stripes of blue and yellow.
  2. Now ask: what do the boats do? With lining, nothing; an -ing word alone can't be the main verb. The sentence is a fragment.
  3. Choices B and C keep the boats without a main verb. Choice D gives the plural subject boats the plural verb line, so the sentence is complete.

Why each choice is right or wrong

  • A. Incorrect. NO CHANGE leaves lining, an -ing word that can't be a main verb on its own, so the sentence never says what the boats do: it is a fragment.
  • B. Incorrect. Having lined is also a verbal phrase, not a main verb, so the sentence remains a fragment.
  • C. Incorrect. Which line starts a relative clause describing the boats; it still leaves the subject boats without a main verb.
  • D. Correct. The plural subject boats gets the main verb line: The small wooden boats ... line the harbor every morning before dawn.

Trap Long subjects hide missing verbs

When a subject is followed by a long describing clause (that fishers have built...) or a phrase set off by commas, the sentence can feel finished before it has a main verb. Cross out everything that only describes the subject, then check that a real verb is left.

Watch for the reverse trap, too: a word such as which, although, or because added to a choice can turn a correct sentence into a fragment.

Trap Words like however don't join sentences

However, therefore, and for example sound like connectors, but a comma before them does not join two independent clauses: It sold bread, however, its owners added pies is still a comma splice. Use a semicolon or a period before the word, or a comma plus and, but, or so instead.

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Each test mirrors the digital SAT®: 98 questions across four modules, 2 hr 14 min on official timing.

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Same 98-question format, built from harder material: a hard Module 1, then a Module 2 made mostly of the hardest questions.

Vocab

Study the classic SAT® vocabulary list. Browse, flip flashcards, or quiz yourself.

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