ACT test study guide: the official ACT prep guide and how to study

The Official ACT Prep Guide

The Official ACT Prep Guide is written by the makers of the test. ACT’s page lists the 2026 to 2027 edition with four practice tests that reflect the current ACT format, clear explanations for every answer, tips for English, math and reading, and advice on preparing mentally and physically for test day.

ACT also sells targeted subject guides, in new editions for 2026 to 2027, each with an access code for one year of an online question bank, and an all-in-one prep guide with four practice tests in the latest format. If you want a single ACT test prep book, the official prep guide is the one that comes from ACT itself.

Source: ACT — The Official ACT Prep Guide. Checked 19 October 2026.

The Official ACT Prep Guide 2025-2026 or 2026-2027?

If you are searching for The Official ACT Prep Guide 2025-2026, note that ACT’s own page now shows the 2026 to 2027 edition, which ACT says reflects the current ACT format. We could not check the content of the older edition on ACT’s site, so this page makes no claims about it. Buy the edition ACT currently lists if you are testing in the 2026 to 2027 school year.

Source: ACT — The Official ACT Prep Guide. Checked 19 October 2026.

Free ACT exam study guide material from ACT

You do not need to buy an ACT exam study guide to start. ACT’s free booklet Preparing for the ACT includes a complete practice ACT with retired questions, a practice writing test, answer keys and scoring instructions. ACT also offers free Practice Tests 1 to 4 online and on paper, free eBooks with practice questions and section strategies, and study tips for every section.

Source: ACT — Free ACT practice tests and prep. Checked 19 October 2026.

What to study: ACT content by section

ACT publishes how each section is weighted. Use these weights to decide where your study time goes.

• Math: Preparing for Higher Math about 80%, Integrating Essential Skills about 20%
• Reading: Key Ideas and Details 44 to 52%, Craft and Structure 26 to 33%, Integration of Knowledge and Ideas 19 to 26%
• Science (optional): Interpretation of Data 38 to 50%, Scientific Investigation 18 to 32%, Evaluation of Scientific Arguments and Models with Evidence 24 to 38%
• English: Production of Writing and Conventions of Standard English 38 to 43% each, Knowledge of Language 18 to 23%

Source: ACT — Preparing for the ACT Test 2025/2026. Checked 19 October 2026.

How to study for the ACT test

Start with one full official practice test under timed conditions and score it with ACT’s key. That baseline tells you which section costs you the most points, and that is where your first weeks go.

Then study for ACT test day in cycles: learn the content for one weak category, practise questions on it, and retest with a timed section. ACT’s own strategy advice is to pace yourself, answer the easier questions first, eliminate wrong answers, and answer every question, because there is no penalty for guessing.

In the final weeks, take full practice tests at the same time of day as your test, with the calculator you will bring. Review every miss, including lucky guesses.

Source: ACT — Preparing for the ACT Test 2025/2026. Checked 19 October 2026.

Practice questions alongside the study guide

A study guide has a fixed number of practice tests; once you have used them, you need fresh questions. Certsqill’s ACT practice questions are expert-developed, explain every answer option and build a readiness score per section, so you know when you are ready to book.

ACT study guide: questions people ask

What is the official ACT prep guide?

The Official ACT Prep Guide from the makers of the ACT. ACT’s page shows the 2026-2027 edition with four full-length practice tests and explanations for every answer. Source: ACT, checked 19 October 2026.

How do you study for the ACT test?

Take a timed official practice test, find your weakest section, study and practise that content, then retest. Use ACT’s free practice tests and the section weights ACT publishes.

Is there a free ACT study guide?

Yes. ACT’s Preparing for the ACT booklet with a complete practice test is free, along with Practice Tests 1 to 4 and free eBooks. Source: ACT, checked 19 October 2026.

Which ACT study guide is best for the current test?

One that matches the current format. ACT says its 2026-2027 Official ACT Prep Guide reflects the current ACT format. Source: ACT, checked 19 October 2026.

Do ACT subject guides include online practice?

Yes. ACT says each subject guide has an access code for one year of an online question bank. Source: ACT, checked 19 October 2026.