By Glyn Caddell, BSME · Author of Digital SAT Math Secrets · Tutoring since 2008 — Published September 23, 2026
Khan Academy offers free Digital SAT preparation, built in partnership with the College Board.
For a lot of students, it’s all they need. That’s worth saying in the first paragraph rather than at the bottom of a page selling something else.
This page covers what Khan Academy does, where it’s better than anything we sell, what a paid course adds, and how to tell which one fits.
A note about who’s telling you this. Caddell Prep sells a paid SAT course. This is a comparison written by someone with an interest in the answer, and the thing being compared against is free.
Here’s the standard. This page names where Khan Academy is better, including the places we can’t match it, and it says plainly when free is the right choice. If it doesn’t do both, don’t trust the rest of it.
Table of Contents
- What Does Khan Academy Offer?
- Where Is Khan Academy Better?
- What Does a Paid Course Add?
- Which One Should You Use?
- Can You Use Both?
What Does Khan Academy Offer?
Official Digital SAT Prep on Khan Academy is free, and it’s built in partnership with the College Board.
That partnership matters more than it sounds. It means Khan’s practice questions come from the College Board rather than being written by a third party trying to imitate the test.
What’s in it:
- Practice questions sourced from the College Board, organized by skill area
- Instructional videos explaining concepts and question types
- Skill mastery tracking that monitors performance across topic areas and suggests where to focus
- Adaptive practice that adjusts to the student’s level
There’s also a connection to Bluebook worth knowing about. After a student takes a full-length practice test in the College Board’s Bluebook app, the scorecard offers a link into Khan Academy that walks through every question on that test, with each explanation pointing to a lesson on the skill behind it.
That’s a genuinely good system, and it’s free. You can find it at Official Digital SAT Prep on Khan Academy.
Descriptions checked against Khan Academy’s help center and the College Board’s own page in [September 2026]. Both organizations update their tools, so check before relying on any detail here.
Two parts of that are better than anything a paid course can offer.
Where Is Khan Academy Better?
Three things, and none of them are close.
The questions are official. Khan’s practice content comes from the people who write the test. Ours is modeled on the practice tests the College Board has released, which is the best a third party can do, and it isn’t the same thing. No amount of quality in a written-from-scratch question closes that gap.
Bluebook is the real test. The free full-length adaptive practice tests in Bluebook run in the actual app a student will use on test day, under the actual conditions. Every student should take them, including students who have paid us. No commercial simulation is closer, and ours isn’t either.
It’s free. For a student who will do the work, free is the correct price. That isn’t a consolation prize.
What a paid course adds is narrower than most comparison pages will tell you.
What Does a Paid Course Add?
Four things, and it’s worth being precise about them.
Finer categorization, with the frequency published. Khan recommends at the level of College Board skill areas. We categorized every question on the released practice tests into 32 specific topics, 17 in math and 15 in Reading & Writing, and measured how often each one appears. So a student learns not just that he’s weak in something, but what that weakness is worth. Linear functions is 15% of the math questions. Exponents is 1.3%.
Lessons ordered by that frequency. The sequence follows how often topics are tested rather than how a textbook is organized. In our math book, the first three lessons cover 68.6% of the math questions.
A video explanation for every practice question. Not most of them. Every one. Khan Academy has instructional videos for concepts and written explanations for questions. This is the clearest single difference between the two.
One instructor. The person who built the course, categorized the questions, and wrote the book teaches every lesson in it.
One thing we won’t claim: that Khan Academy doesn’t tell you what to study. It does. It tracks skill mastery and suggests where to focus. The difference is how finely, and whether the ordering is published.
See the full frequency data for the 17 Digital SAT math topics and the 15 Digital SAT Reading & Writing topics.
With the differences on the table, the question is which one fits.
Want to Know What 5 Topics Will Improve Your SAT Score the Most?
Sample Feedback from our Diagnostic Test:
Which One Should You Use?
It comes down to the student rather than the material.
Khan Academy is enough for a self-motivated student who needs content review and format familiarity, and who will work through free material without anyone checking on him. Not a starting point. Enough.
A paid course is worth it in three situations. A student who wants the topics prioritized more finely than skill areas allow. A student who learns better watching someone work a problem than reading an explanation of it. And a student who won’t open free material on a Tuesday night without someone expecting him to.
That third one is the honest one, and it has nothing to do with the quality of either product. Free material asks a student to supply his own accountability. Some can. Plenty can’t, and a parent normally knows which they have.
Which option fits which student
| Khan Academy | A paid course | |
|---|---|---|
| Cost | Free | Paid |
| Questions | Official College Board | Modeled on released tests |
| Topic guidance | By skill area | 32 topics, ordered by frequency |
| Explanations | Written, plus concept videos | Video for every question |
| Accountability | None | Course structure, live options |
The table above shows which option fits which student on the dimensions that actually differ. What it doesn’t show is that these aren’t mutually exclusive.
Can You Use Both?
Yes, and for most students that’s the better answer.
These two things aren’t substitutes for each other in every respect. One has official questions and the real testing app. The other has finer topic data and video explanations. A student can take both.
Use Bluebook for Its Full-Length Tests
Every student should take the free full-length practice tests in Bluebook, whatever else he buys.
They’re the real app, the real adaptive format, and the real conditions. There’s no version of test-day practice that beats sitting the actual software, and we’d rather a student did that than took a simulated test from us or anyone else.
Use Khan Academy for Official Questions
Their question bank is College Board-sourced, and the walk-through you get after a Bluebook test, explaining every question with a link to the underlying skill, is genuinely useful.
That’s worth using alongside anything else. It costs nothing and the questions are the real thing.
The On-Demand SAT Course
Our on-demand SAT course covers all 32 topics with a video explanation for every practice question, five full-length practice tests, and an assessment that ranks which topics are costing the most points. It’s $299 once, with access for the rest of high school.
What it adds over free material is the topic prioritization, the video explanations, and a sequence someone else decided.
How to Choose Between All Four Options
This page compares two of the four ways to prepare. There are two more, and the same three questions decide between all of them.
See how to choose SAT prep for the full comparison, including classes and tutoring.
What If You Start With Khan Academy and Stall?
It happens, and it’s worth reading correctly.
Stalling on free material is normally an answer to the accountability question rather than a sign the material was wrong. The content didn’t fail. The structure was never there.
The signal is a practice test score that’s stopped moving. If two tests in a row come back the same, something needs to change, and it’s normally not which website you’re using.
A free diagnostic SAT will tell you which topics are actually costing points, which is useful whether you carry on with Khan Academy or not.
Glyn Caddell
Glyn Caddell holds a BS in Mechanical Engineering from NJIT and has been tutoring New York City students since 2008. He founded Caddell Prep in 2012 and is the author of Digital SAT Math Secrets: Lessons & Tricks to Quickly Improve to a Perfect 800 on the Math Test, which contains over 900 practice problems and is used in Caddell Prep’s SAT math classes. He is founding president of the Staten Island Technical High School alumni association and teaches every lesson on this site personally.
Finally, an SAT course that students actually understand
Every question has a video explanation. Not most — every one.
The on-demand Digital SAT course covers all 17 math topics and 15 reading and writing topics, with 5 full-length practice tests and a 100-point score increase guarantee. Keep access for the rest of high school. No subscription.
Want to Know What 5 Topics Will Improve Your SAT Score the Most?
Sample Feedback from our Diagnostic Test: