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Take a short diagnostic drill in each section. See exactly which topics are costing you the most points.
ACT 2025–2026 · Official format
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ACT Science · Data Interpretation
Table 1 shows the reaction rate (mol/s) of three enzymes at four temperatures.
Temperature (°C) | Enzyme A | Enzyme B | Enzyme C
10°C | 0.2 | 0.4 | 0.1
20°C | 0.6 | 0.9 | 0.5
30°C | 1.1 | 1.4 | 0.8
40°C | 0.7 | 1.1 | 0.3
According to Table 1, which enzyme had the highest reaction rate at 20°C?
All 4 ACT sections
Choose your section
Each section has interactive lessons, a question bank, and full-length practice.
ACT English
Grammar, punctuation, sentence structure, and rhetorical skills. The editor role: you improve 5 passages across 75 questions in 45 minutes.
ACT Math
Pre-algebra through trigonometry. Calculator allowed. Questions increase in difficulty — easy points early, hard problems at the end. No formula sheet.
ACT Reading
4 long passages — literary narrative, social science, humanities, natural science. 40 questions in 35 minutes. Time management is the core skill.
ACT Science
No science knowledge required. It's a data-reading test — graphs, tables, and experiments. 40 questions in 35 minutes.
Your study path
How it works
From zero to test-ready in 4 steps. Most students hit their goal in 6–10 weeks.
Learn the skill
Each lesson teaches the rule, shows worked examples with trap patterns, and gives you strategy steps.
Drill with feedback
Practice questions with immediate explanations. Every wrong answer shows you exactly which trap you fell into.
Take a full mock test
Simulate real test conditions. See your composite score, section scores, and section-by-section weakness map.
ACT vs SAT — which should you take?
| ACT | SAT | |
|---|---|---|
| Score range | 1–36 composite | 400–1600 composite |
| Sections | English, Math, Reading, Science | Reading/Writing, Math |
| Science section | Yes (data literacy) | No |
| Adaptive | No — linear | Yes — adaptive modules |
| Calculator | Allowed throughout Math | Allowed throughout Math (Digital SAT) |
| Accepted by | All US colleges & universities | All US colleges & universities |
| Time pressure | Higher (faster per question) | Lower (more time per question) |
Both tests are equally accepted. Take a practice test of each to see which plays to your strengths. Full ACT vs SAT guide →
Questions
Frequently asked questions
Yes — 100% free. No account required to start, no credit card, no paywall. Every lesson, every question, every mock test.
Four sections: English (grammar, punctuation, rhetorical skills), Math (pre-algebra through trigonometry), Reading (long passage comprehension), and Science (data interpretation). Your composite score (1–36) is the average of all four section scores, so each section counts equally.
The ACT has a Science section the SAT does not. ACT is linear (not adaptive), has 5 answer choices in Math, and is generally more time-pressured. Both are accepted equally by all US colleges.
No — this is the most important thing to understand. ACT Science is a data-reading test, not a science knowledge test. Every answer is in the passage. You are reading graphs and tables, not recalling biology or chemistry facts.
6–10 weeks at 30 minutes/day is a reliable baseline. Students starting below a 20 benefit from 10–12 weeks. The Science and English sections respond fastest to targeted prep.
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