Short version: start with College Board's question bank, because those questions come from the people who write the test. The limit is that you see each one once. Sigma Prep's bank is modeled on theirs with six or seven variations of most questions, so you can drill a type until it sticks, and every one has a video solution.
If you are serious about SAT Math, where you practice matters a lot. Practicing bad problems is worse than practicing nothing. You end up learning patterns that do not show up on the real test, which wastes time and gives you a false sense of readiness.
Here is an honest ranking of the best SAT Math practice sources, based on what actually prepares you for the real test.
1. College Board (Bluebook)
First place, no debate. The College Board makes the SAT. Their official practice tests and problems come from the exact same team that writes the real test, with the exact same style, phrasing, and difficulty calibration.
Use Bluebook for:
- Full-length diagnostic tests (8 available, all free)
- Authentic question formatting and interface (same software as the real test)
- Practice problems that feel identical to the real thing
The downside of Bluebook is quantity. Six tests plus some additional practice questions is enough to learn the format, but not enough to truly master every topic. If you work through everything Bluebook offers, you still need more practice.
For why Bluebook is the only source with accurate scoring, see our deeper breakdown on practice test accuracy.
2. Sigma Prep
This is our own platform, so take the placement with a grain of salt, but here is the reasoning.
We took every problem type the College Board uses and built a library of replica problems with enough variety that you can drill each topic until it is automatic. Where Bluebook might have 8-10 examples of, say, discriminant problems, Sigma Prep has 4-5 times that many. You can practice the same topic repeatedly without ever seeing the same exact problem twice.
Every problem is hand-curated by a tutor with 10+ years of SAT experience, which means two things: the style matches the real test, and we cut the problem types that almost never show up. No wasted time on trivial edge cases.
Every problem also has a video explanation showing the fastest solution, usually with Desmos.
Since this post was first written, a few things have been added that change the picture. There is a free full-length practice test, two adaptive modules like the real thing, no card required. There are 24 full-length tests in all, three versions of each of the eight Bluebook tests, so a retake is never the same test twice. Every problem still comes with a video. The SAT Math formula sheet, 24 diagrams covering everything the reference sheet leaves out, is free with an account. And in August 2026, ten students sent in their official score reports after preparing here: math scores from 690 to 790, with total gains between 80 and 210 points.
Use Sigma Prep for:
- Drilling specific topics you are weak on after a Bluebook diagnostic
- Video-based learning when you need an explanation, not just an answer
- Separated difficulty tiers (Easy, Medium, Hard) so you know where you stand
- Timed practice tests when you have exhausted Bluebook's 8 tests and need fresh full-length exams with video walkthroughs
3. Khan Academy
Khan Academy is free, official (partnered with College Board), and it is better than nothing. It is a solid starting point for foundational math skills.
The issue is that Khan's SAT practice is broad rather than deep. Their explanations are often text-based and geared toward general math, not toward what the SAT actually asks. Many of their problems do not match the current digital SAT's exact style. We wrote a full review of Khan with more detail.
Use Khan for:
- Foundational review if your underlying math skills are rusty
- Free access to some official College Board practice
Do not rely on Khan for:
- Targeted SAT-specific strategy
- Desmos integration
- Rapid progress in a short timeframe
4. UWorld
UWorld is a test-prep company that has built a reputation in med school and law school prep and expanded into SAT. Their questions are well-written, with thorough text-based explanations.
Two issues. First, their price point is higher than Khan or Sigma Prep for roughly similar content depth. Second, their explanations are mostly written, not video, which matters less for visual learners.
Use UWorld if you like written explanations over video and do not mind paying more for them.
5. Princeton Review, Kaplan, Barron's (Books and Online Courses)
The big test-prep brands offer thousands of practice problems. Quality varies. The books are often fine. The online courses are usually overpriced for what they offer.
The bigger issue is that their questions are written by third parties trying to match College Board style. They sometimes miss the mark, emphasizing question types that do not actually appear on the real test, or using phrasing that feels off.
Use these for supplementary practice if you have exhausted everything else. Do not start here.
6. Random Free SAT Practice Sites
Skip most of these. The quality is too inconsistent and you cannot tell good from bad until after you have wasted time on bad problems.
Exception: any source that explicitly pulls from College Board's own released problems is fine. But at that point, just use Bluebook directly.
What Each One Costs
Listed prices as of September 2026. Check each site before you buy.
The Practical Path
Here is the prep flow I would recommend:
- Start with Bluebook. Take a full-length practice test to establish a baseline.
- Identify your weak topics. Look at what you got wrong and categorize by topic and difficulty.
- Drill those topics on Sigma Prep. Use the difficulty-separated practice to focus exactly where you need work.
- Retake a Bluebook test every few weeks to measure progress on real test-equivalent scoring.
If you want to try Sigma Prep free first, the Diagnostic Quiz takes 15 minutes, covers 12 real SAT questions, and shows you how our video-retry system works. No payment required.