Free diagnostic test
A short adaptive test that names the exact skills holding back the state test score.
Diagnosticfree
Continue my checkFree, ~20 min, adaptiveBrowse all diagnosticsEvery exam, one catalogueSample reportSee what you getStart here
One free check, four named gaps
About 20 minutes, no card. The report is ready the same day.
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8 live 1:1 classes a month
Your tutor already knows which skills are weak. No hour spent rediscovering them.
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Practice until it holds
Unlimited attempts for one subject, with explanations and a trend by skill.
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863 practice papers written for each state’s own tests, including North Carolina EOG and EOC, Texas STAAR and STAAR EOC and California CAASPP. AP, ACT and PSAT practice too.
863 practice papersNorth Carolina EOG · Grades 3–8From the first state test to college admission, and the practice papers we have for each.
Grades 3–12
Each state’s own test in Mathematics, English Language Arts, Science and Social Studies.
North Carolina EOG, Texas STAAR and California CAASPP
High school
End-of-course exams, one for each course.
North Carolina EOC, Texas STAAR EOC and Kansas KAP
Grades 8–12
Tests taken across the United States.
AP, ACT, PSAT and ACT
Choose a state to see its tests and every practice paper we have for them.
College admission and credit tests taken across the United States.

Every paper your child finishes is one more they have already done before test day.
Written for each state’s own tests, in the grades and subjects each test covers.
Sit a paper timed like test day, or untimed while your child is still learning.
Your child sees the right answer and why. Missed questions come back as their own practice set.
Diagnose, learn, prove. Each part feeds the next, so nothing is guesswork.
See how prepGro works
A short adaptive test that names the exact skills holding back the state test score.
A weekly plan of short lessons mapped to the diagnostic. Live 1:1 tutoring is an optional add-on whenever you want one.
Every state test paper as often as your child likes, with explanations — and every missed question comes back as its own scored set until it's fixed.
Fall seven times, stand up eight.
Choose your state, start with one practice paper today, and let your child walk into test day having done it before.
Practice papers for 48 states’ tests, including North Carolina EOG and EOC, Texas STAAR and STAAR EOC and California CAASPP. Choose your state above to see every paper we have for it.
No. They are practice papers written for the same grades and subjects. PrepGro is independent and is not affiliated with the education authorities that run these exams.
Grades 3–12: Mathematics, English Language Arts, Science and Social Studies.
Unlimited practice tests across every subject at the grade level you choose, timed or untimed, with answer explanations, review and skill-level progress tracking.
Yes, as an optional add-on. Practice papers work on their own. When you want more help, add live 1:1 classes with a tutor who can see your child’s practice results and works on the skills they show.
Practice helps your child prepare, and every paper shows what to work on next. No one can promise a test result, and prepGro does not.