Free
$0no card needed
- The Daily, every day
- 36 practice questions a day, each with an explanation: 12 easy, 12 medium, 12 hard
- Full-length Test A and Challenge Test 1
- All 1,023 vocabulary words: browse, flashcards and quiz
Digital SAT practice
Reach your peak.
A quick run every day, an explanation for every question, and full-length tests on official timing.
Free, no card. You also get 36 practice questions a day: 12 easy, 12 medium and 12 hard.
The DailySTEP 1
- Three hearts. A miss costs one.
- Streaks pay. ×2 from three in a row, ×3 from six.
- Your longest streak. Beat it tomorrow.
Full-length tests
The real test, rehearsed.
98 questions across four modules, in the digital SAT’s order and on its timing, with a highlighter, a question map and a timer you can see.
How it works
One run a day. One skill at a time.
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1
Play the Daily.
A quick run with three hearts. String right answers together and the questions get harder and the points multiply.
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2
Miss one, learn why.
Every question is tagged by domain and skill, and every answer comes with an explanation.
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3
Drill that skill.
Practice any single skill at any difficulty, or just the questions you got wrong.
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4
Beat your best.
Come back tomorrow and climb. Progress shows your accuracy and your strongest skills.
Built around the real SAT blueprint.
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.
Free daily practice
12 easy, 12 medium and 12 hard questions free every day, each with a full explanation. Filter by section, domain, skill and difficulty. Resets at midnight.
Real SAT timing
Take any test on official timing, extended 1.5× time, or untimed to focus purely on accuracy.
Adaptive full-length tests
Four modules in official order. The second module of each section adapts to how you did on the first.
Vocabulary
1,023 essential SAT words. Browse the list, flip flashcards, or quiz yourself.
Your progress
Accuracy across daily practice and full tests, your strongest skills, and the ones that need the most help.
Games
PEAK Survivor, Hole and Peak Defense: three games powered by SAT practice questions.
Explanations
Every answer, explained.
Not just the right letter: how to get there, and why the tempting answer is wrong.
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: $100→then$120→then$96
Turn each change into a multiplier.
Up 20% means × 1.20. Down 20% means × 0.80.
Apply them in order.
1.20 × 0.80 = 0.96
Read the answer.
The final price is 96% of the original. That’s B.
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.
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Reading & Writing · Module 1
27 questions32 min
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Reading & Writing · Module 2
27 questions32 min
Adapts to how you did on Module 1. -
Break
10 min
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Math · Module 1
22 questions35 min
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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
Peakscor by the numbers
- 36free practice questions every day
- 98questions in every full-length test
- 1,023SAT vocabulary words
- 1.5×extended-time option on every test
Plans
Free every day. Pro when you’re serious.
The free plan is the real thing, not a trial. Pro removes the limits. Peak adds the full course and a plan to test day.
Pro
$20a month, or $200 a year
- Everything in Free
- Unlimited practice, no daily limit
- Every full-length test and Challenge test
Peak
$29a month, or $280 a year
- Everything in Pro
- The full Learn course: every lesson and mastery quiz
- Peak Plan, day by day to test day
Prices in US dollars. Cancel anytime.
FAQ
Questions, answered.
The Daily, plus 36 practice questions every day: 12 easy, 12 medium and 12 hard, each with a full explanation. Full-length Test A, Challenge Test 1 and all 1,023 vocabulary words are free too. 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. 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 digital SAT’s order: 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 use the hardest material throughout.
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. You get a fresh 12 easy, 12 medium and 12 hard.
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.
Two-variable data · Lesson 1
Reading a scatterplot
A scatterplot shows two measurements for each member of a group. Each dot is one member, such as one day or one student: its -coordinate is one measurement and its -coordinate is the other. Before you answer anything, read the axis titles and their units.
Direction. If the dots tend to rise from left to right, the association is positive: larger -values go with larger -values. If they tend to fall, it is negative. If the dots show no pattern at all, just a shapeless cloud, there is no association. (A curve that rises and then falls is still an association, even though it has no single direction.)
Form. If the dots cluster around a straight line, the association is linear. If they follow a curve, such as one that rises more and more steeply, or one that rises and then falls, it is nonlinear.
Strength. An association is strong when the dots sit close to the pattern and weak when they are spread far from it. Strength is about how tightly the dots follow the pattern, not how steep it is: a steep cloud of loosely scattered dots is weak, and a gently rising band of tightly packed dots is strong.
Association is not cause. A scatterplot of recorded data shows that two quantities change together. It can't show that one causes the other, because a third factor may drive both. A cause-and-effect conclusion needs an experiment in which the researcher randomly assigns the treatment.
Worked example Easy
A café owner recorded the high temperature, in degrees Celsius, and the number of hot drinks the café sold on each of 10 days. The results are shown in the scatterplot.
Which statement is best supported by the scatterplot?
- On days with higher temperatures, the café tended to sell fewer hot drinks.Answer
- On days with higher temperatures, the café tended to sell more hot drinks.
- The higher temperatures caused the café to sell fewer hot drinks on those days.
- There is no clear association between the temperature and the drinks sold.
How to solve it
- Read the axes: is the high temperature and is the number of hot drinks sold.
- Follow the dots from left to right. At 4°C the café sold 140 drinks, at 12°C it sold 100, and at 22°C it sold 40. No dot is higher than a dot to its left.
- The dots fall from left to right, so the association is negative: hotter days went with fewer hot drinks sold.
- The owner only recorded what happened, so the data show a tendency, not a cause.
Why each choice is right or wrong
- A. Correct. As the temperature rises from 4°C to 22°C, sales fall from 140 to 40 drinks, and no dot is higher than one to its left. That is a negative association.
- B. Incorrect. This reads the trend backward. The dots fall from left to right: 140 drinks at 4°C but only 40 at 22°C.
- C. Incorrect. The owner recorded data and did not run an experiment, so the scatterplot can't show cause. A third factor could drive both: the hot days might fall during a holiday month when a nearby school or office is closed, so fewer regular customers come in.
- D. Incorrect. There is a clear downward trend: 140 drinks at 4°C, 100 at 12°C and 40 at 22°C. No association would mean the dots form a shapeless cloud with no pattern.
Worked example Medium
A biologist measured the area, in square meters, covered by a patch of algae at the end of each of 6 weeks. The results are shown in the scatterplot.
Which statement best describes the data?
- The area grew by about the same amount each week, so the association is linear.
- The area doubled every week, so the association between week and area is nonlinear.
- The area grew by more each week than the week before, so the association is nonlinear.Answer
- The area grew by less each week than the week before, so the association is nonlinear.
How to solve it
- Find how much the area grew each week: , , , and .
- The weekly growth is not constant, so the dots do not lie along a line. They curve upward more and more steeply.
- Check doubling too: 5 to 10 to 20 doubles, but 20 to 35 does not (doubling would give 40).
- The area rises every week, so the association is positive, and each weekly increase is larger than the one before, so it is nonlinear.
Why each choice is right or wrong
- A. Incorrect. The weekly increases are 5, 10, 15, 20 and 25 square meters. A linear association needs about the same increase for each week.
- B. Incorrect. The area doubles only for the first two weeks (5 to 10 to 20). From week 3 to week 4 it goes from 20 to 35, not 40, and from week 4 to week 5 it goes from 35 to 55, not 70.
- C. Correct. The weekly increases are 5, 10, 15, 20 and 25 square meters, each larger than the one before, so the dots curve upward and the association is nonlinear.
- D. Incorrect. This reads the increases backward. They grow from 5 to 25 square meters per week, so each week adds more, not less.
Trap Steep is not the same as strong
A steep pattern can be weak and a gentle one can be strong. Judge strength by how close the dots sit to the line or curve they follow, not by how fast they rise or fall.
Trap Turning an association into a cause
Choices that say one quantity causes, leads to or will raise the other go beyond recorded data. Unless the data come from an experiment with random assignment, the supported statement is about what tends to go together: *those with more of tended to have more of *.
Also watch for statements that make the trend a rule for every individual, such as every student who slept longer scored higher. A positive association is a tendency, so some dots can go against it. (A phrase like for each additional year, the predicted price... is fine: it describes the model, not every individual.)
Desmos When Desmos isn’t faster
On a scatterplot question you read direction, form and strength straight from the picture, so Desmos usually adds nothing.
If the pairs come in a table instead of a graph, you can add a table in Desmos (from the + menu), type the pairs, and Desmos plots them as points. For a question about the trend, a quick look at whether the -values go up or down as goes up is usually faster than typing.
Practice
Choose a section, then practice a whole domain or drill a single skill.
Full-length tests
Each test mirrors the digital SAT: 98 questions across four modules, 2 hr 14 min on official timing.
A little harder than the real SAT. These tests can run slightly tougher than test day, which makes them good practice: if you can handle these, the real one should feel easier. No question appears in more than one test, Challenge Tests included.
Challenge Tests Hardest of the hardest
Same 98-question format, but every question is drawn from the toughest SAT material: Challenging-tier math throughout and the hardest reading.
Vocab
Study the classic SAT vocabulary list. Browse, flip flashcards, or quiz yourself.
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