PrintMathFacts is built by an engineer and parent who spent years building math practice software for his own child — including the mistake-driven review system that became this site's Mastery Map.
Why deterministic, not AI
Every worksheet here is generated by deterministic code: the problems are constructed, the answers are computed. That is why we can promise every answer key is correct — a promise AI-generated worksheets cannot make. AI is a wonderful writing partner; your child's answer key should not be a language model's best guess.
The method
The practice design borrows from the fact-fluency tradition East Asian classrooms are known for: short daily timed drills, balanced coverage of the whole fact space, and — most importantly — practice aimed at the facts a student misses, not random review. The Mastery Map and Smart Sheets exist to make that targeting automatic.
Principles
Free to use, no login walls, no watermarks, answer keys always included, and children's practice data stays on the device. If we ever add paid features, the core generator stays free.