Homework help
Understand a math problem
Upload a photo, type the problem, or explain what you tried by voice. The AI tutor turns your explanation into text, checks the reasoning you used, and can read its feedback aloud.
Math help · SAT prep · Real teacher support
Math help that teaches you how to solve it.
Send any math problem by photo, typing, or voice. Get AI feedback on your work, prepare for SAT Math, or get personal help from a real math teacher.
Real-teacher support by private message or Zoom. 10+ years of teaching experience.
The expanded printable edition
Your SAT Math workbook. Ready to print.
43 lessons with worked examples. 603 original questions with explained answers. Exactly 9 boxed questions on each practice page.
Print at homePDF download after payment
Buy the study guide — $29USD · One-time purchase · No account required
Sold separately from SAT membership. Printable PDF only; no physical book is shipped.
Three ways CountOnX helps
Start with the help you need today.
SAT Math prep
Prepare for SAT Math
Take a 16-question diagnostic across all four SAT Math domains, see the skill behind each missed question, and practice the right area next.
Ask a real teacher
Connect with a real teacher
Get personal math help from a real teacher. Send your question, a photo of your work, or a voice note—or request a private 30- or 40-minute Zoom lesson.
Message a teacher Book a Zoom lesson
Paid support. View prices and reply times before checkout. Zoom requests require teacher approval.
Learn one step at a time.
What makes CountOnX different
Learn from your attempt—not just a solution.
Most answer tools stop at the result. CountOnX starts with the work you tried, explains the step to check, and helps you make the next move yourself.
Create a free accountSAT Math practice
SAT prep that tells you what to work on next.
Start with a 16-question diagnostic across all four SAT Math domains. CountOnX connects missed questions to the SAT skill and subskill underneath them, then recommends one useful next step.
Start with CountOnX practice to build your SAT Math skill plan, get feedback, and track what you have truly learned. CountOnX does not reproduce or host College Board's copyrighted questions.
CountOnX is independent and is not affiliated with or endorsed by College Board.
Inside the SAT Math plan
- 4
- SAT domains
- 17
- skills
- 43
- subskills
- A 16-question diagnostic across all four SAT Math domains
- Original practice tied to selected skills
- Progress based on repeated evidence—not a made-up score prediction
628 educator-approved original questions across 43 SAT Math skills. CountOnX is not an official SAT exam.