Math practice that grows with your child
322 Common Core skills with lessons, adaptive questions and feedback that explains each mistake.
Free while in beta · No ads · Made for families
How it works
- 1
Learn
A short lesson and worked examples for every skill.
- 2
Practice
Questions adapt as your child answers, never too easy or too hard for long.
- 3
Master
Reach a SmartScore of 100, then quick reviews keep it fresh.
Feedback that teaches
When an answer is wrong, NimboStar spots the likely slip, like adding the bottoms of fractions, and walks through the right way.
Rewards that keep them going
XP for every right answer and levels that unlock new avatars and page backgrounds. Badges for streaks and mastery, and a leaderboard with friendly made-up names.
See their week at a glance
Weekly reports show time practiced, accuracy and new skills mastered.
Everything in one place
Hints when stuck
Step-by-step hints on every question.
Mistake notebook
Missed questions come back to try again.
Spaced review
Mastered skills return at the right time.
XP and levels
Level up to unlock avatars, an avatar maker and backgrounds.
Weekly reports
Time, accuracy and progress per child.
Kid-safe
No ads, no chat. Parent settings behind a PIN.
322 skills in 9 grades and courses
Ready to start?
Create a parent account, add your kids, and they can practice in minutes.