Free Test Prep Resources: The Best Tools for SAT + ACT Prep

Updated for the 2026-2027 testing season

Quality test prep doesn't have to break the bank. The landscape of free SAT and ACT preparation resources has improved dramatically in recent years, with official partnerships between testing organizations and educational platforms producing materials that rival many paid programs.

This guide covers the best free resources available, what each one offers, where they fall short, and how to know when free prep is enough — and when it's time to invest in a tutor.

Khan Academy: Official Digital SAT Prep

Khan Academy's Official SAT Prep is the gold standard of free test prep resources. Developed in direct partnership with College Board, it provides practice material created by the same organization that writes the actual test. The platform is entirely free with no hidden costs or premium tiers.

What Khan Academy offers for SAT prep:

Skill-based practice — thousands of official questions organized by content domain and difficulty level (Foundations, Medium, Advanced), letting students target specific weaknesses
Practice test walkthroughs — after taking a full-length practice test in Bluebook, students can access detailed explanations of every question on Khan Academy, with links to relevant lessons
Personalized study plans — the platform identifies areas for improvement and recommends focused practice
Video lessons — clear explanations of underlying math and reading/writing concepts

Limitations: Khan Academy is excellent for content review and targeted practice, but it does not provide test-taking strategy coaching, accountability structures, or personalized feedback on why a student is making specific errors. Self-motivated students can thrive with Khan Academy alone; students who need external structure may plateau without additional support.

College Board Bluebook: The Official Testing App

Bluebook is College Board's free app for taking full-length Digital SAT practice tests. This is the same application students will use on test day, making it the most realistic practice environment available. Bluebook is available for Windows, Mac, iPad, and Chromebook.

What Bluebook offers:

Full-length adaptive practice tests — multiple complete Digital SAT practice tests that use the same adaptive testing format as the real exam
Realistic testing environment — the same interface, timer, tools (including the Desmos calculator), and navigation students will encounter on test day
Immediate scoring — practice test scores are available right after completion
Score reports — detailed breakdowns of performance by content area

How to use it effectively: Download Bluebook early and take your first practice test before beginning any focused preparation. This establishes a baseline score. Then take additional practice tests every 3–4 weeks to measure progress. Between practice tests, use Khan Academy for targeted skill building.

Limitations: Bluebook is a testing tool, not a teaching tool. It tells you what you got wrong but doesn't explain underlying concepts or help you develop strategies for improvement. Pair it with Khan Academy or a tutor for the teaching component.

College Board Question Bank

In addition to full practice tests in Bluebook, College Board offers a free Student Question Bank with thousands of official SAT questions that can be filtered by test section, content domain, skill, and difficulty level. This is an excellent resource for students who want to drill specific question types without sitting through a full practice test.

Official ACT Free Resources

The ACT offers its own set of free preparation materials, which have been updated to reflect the enhanced ACT format that launched in 2025. Key changes to be aware of: the ACT is now shorter (about 2 hours for core sections), the Science section is optional, and the composite score is calculated from English, Math, and Reading only.

Free ACT resources include:

Official practice tests — ACT provides free full-length practice tests on their website at act.org, including tests updated for the enhanced 2025 format
Preparing for the ACT guide — a free PDF containing practice tests with answer explanations, available for download from ACT's website
ACT Academy — free online practice with questions and learning resources
Kaplan partnership — ACT partners with Kaplan to offer free online prep events and resources, including live classes led by high-scoring instructors

Limitations: The ACT's free resources are less comprehensive than what's available for the SAT through Khan Academy. There is no equivalent to the Khan Academy/College Board partnership for ACT prep. Students preparing for the ACT may need to supplement official resources with other free or paid materials.

Desmos: The Calculator You Need to Know

Desmos is the free online graphing calculator built into the Digital SAT's Bluebook app. Every student taking the Digital SAT has access to Desmos during the entire Math section. Learning to use Desmos effectively is not optional — it's a core test prep skill.

Students can practice with the full Desmos graphing calculator for free at desmos.com/calculator. The version available online is the same tool integrated into Bluebook. Key skills to practice include graphing equations, finding intersections, using sliders for variables, and graphing inequalities.

For students taking the ACT, Desmos is also available on the digital ACT for the Math section.

Quality YouTube Channels

Several YouTube channels offer free, high-quality SAT and ACT prep content. While video instruction can't replace hands-on practice, these channels are useful for learning strategies, understanding difficult concepts, and hearing explanations in a different voice than Khan Academy.

Some reputable channels for test prep include those run by experienced tutors who walk through official practice test questions, explain common traps, and teach section-specific strategies. Look for channels that focus on official test materials rather than proprietary questions, as the quality of third-party questions varies widely.

A word of caution: Not all YouTube test prep content is equally reliable. Prioritize channels created by instructors with verified high test scores and years of tutoring experience. Be wary of channels that promise unrealistic score improvements or push expensive paid products.

Building a Free Prep Plan

Here's how to combine these free resources into an effective self-study program:

Week 1 Download Bluebook and take a full-length diagnostic practice test. Record your baseline score and note which sections and question types are weakest.
Weeks 2–4 Use Khan Academy to build skills in your weakest areas. Aim for 30–60 minutes of focused practice 4–5 days per week. Practice with Desmos daily if math is a weak area.
Week 5 Take a second full-length practice test in Bluebook. Compare to your baseline. Identify areas that improved and areas that are still lagging.
Weeks 6–8 Continue targeted practice on Khan Academy. Supplement with the Question Bank for additional practice on specific question types. Review practice test walkthroughs on Khan Academy.
Week 9 Take a third full-length practice test. If scores have improved meaningfully, maintain your approach. If scores are flat, consider whether a tutor might help break through the plateau.
Weeks 10–12 Final review and additional practice tests. Focus on time management and simulating real test conditions (timed, no distractions, full test in one sitting).

When Free Is Enough — and When It's Not

Free resources are enough for many students, particularly those who are self-motivated, comfortable with self-directed learning, and starting from a relatively strong baseline. If your student can follow a study schedule independently, identify and address their own weaknesses, and maintain consistency over 8–12 weeks, free resources may be all they need.

Consider investing in a tutor if:

Scores plateau after 4–6 weeks of self-study. A tutor can diagnose the specific issues causing a plateau and provide targeted strategies that free resources can't.
Your student needs accountability. Some students need external structure — regular sessions, assignments, and someone checking their progress — to stay on track.
There's a significant score gap to close. Students who need to improve by 150+ points on the SAT typically benefit from expert guidance to prioritize the highest-impact areas.
Test anxiety is a factor. Anxiety management strategies and test-day skills are areas where a skilled tutor adds significant value beyond what self-study can provide.
Your student has learning differences. Students with ADHD, dyslexia, or other learning differences often benefit from tutors who can adapt their approach. Read our guide on test prep for students with learning differences →
Time is limited. If your student has 4 weeks before the test instead of 12, a tutor can prioritize the highest-impact strategies for a compressed timeline.

Many families find the best approach is a combination: use free resources as the foundation and add tutoring for personalized strategy and accountability. Our guide on test prep costs covers what to expect for pricing in the Philadelphia area.

Free Resources Quick Reference

Resource	Best For	Test
Khan Academy Official SAT Prep	Skill building, targeted practice, video lessons	SAT
College Board Bluebook App	Full-length practice tests, realistic test simulation	SAT, PSAT
College Board Question Bank	Drilling specific question types and skills	SAT
ACT Official Practice Tests	Full-length ACT practice (enhanced 2025 format)	ACT
Preparing for the ACT Guide (PDF)	Practice tests with answer explanations	ACT
Desmos (desmos.com)	Graphing calculator practice for SAT/ACT math	SAT, ACT

Find a Tutor When You're Ready

If you decide your student would benefit from professional guidance alongside free resources, browse our directory to find SAT and ACT tutors in the Greater Philadelphia area. Many offer free initial consultations, so you can evaluate fit before committing.

Main Line tutors
Center City Philadelphia tutors
Montgomery County tutors
Delaware County tutors
Bucks County tutors
South Jersey tutors
Princeton Area tutors
Online tutors (available throughout Greater Philadelphia)

Related Guides

The Complete SAT & ACT Prep Guide — when to start, how long it takes, and what to expect
Digital SAT Changes: What Families Need to Know — everything about the new digital format
What Does Test Prep Cost? — pricing breakdown for the Philadelphia area
How to Choose the Right Tutor — what to look for and red flags to avoid
Test Prep for Students with Learning Differences — accommodations, strategies, and finding the right tutor

Frequently Asked Questions

Is Khan Academy SAT prep really free?

Yes. Official SAT Prep on Khan Academy is 100% free and developed in direct partnership with College Board. There are no hidden fees, premium tiers, or paid upgrades. You get full access to practice questions, skill-building lessons, and practice test walkthroughs at no cost.

Can my student get a good SAT score using only free resources?

Many students achieve strong scores using only free resources, especially self-motivated learners who can follow a structured study schedule. Free tools like Khan Academy and Bluebook provide high-quality, official practice material. However, students who need help with accountability, test strategy, or specific weaknesses often benefit from working with a tutor alongside free resources.

What's the difference between Khan Academy and the Bluebook app?

Khan Academy provides skill-building lessons, practice questions organized by topic and difficulty, and detailed walkthroughs of practice tests. Bluebook is College Board's testing app where students take full-length, timed practice tests that simulate the real Digital SAT experience. They're designed to work together: practice in Bluebook, then review and build skills on Khan Academy.

Are there free ACT practice tests available?

Yes. ACT offers free full-length practice tests on their website (act.org), including tests updated for the enhanced 2025 ACT format. The official 'Preparing for the ACT' guide, available as a free PDF, contains practice tests with answer explanations. ACT also partners with Kaplan to offer free online prep resources.

When should I consider hiring a tutor instead of using free resources?

Consider a tutor if your student has been self-studying for 4–6 weeks without meaningful score improvement, struggles with accountability or maintaining a study schedule, needs significant improvement in a short timeframe, has test anxiety that affects performance, or has specific learning differences that require adapted instruction. A tutor provides personalized strategy, accountability, and the ability to diagnose and address individual weaknesses efficiently.

Is the Desmos calculator the same on Khan Academy and the real SAT?

The Desmos graphing calculator integrated into the Bluebook app for the Digital SAT is the same Desmos tool available for free at desmos.com. Practicing with Desmos online gives students experience with the same calculator they'll use on test day. Khan Academy also incorporates Desmos in its math practice.