Teacher resources
Everything on NumThink is free for classroom use. The worksheet generators below produce a unique sheet every time — no two students get the same page — with answer keys on a separate printed page.
Worksheet generators by topic
Times tables
Difficulty 1–3 · 10–60 questions · answer key
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multiplication
Difficulty 1–3 · 10–60 questions · answer key
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addition
Difficulty 1–3 · 10–60 questions · answer key
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subtraction
Difficulty 1–3 · 10–60 questions · answer key
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division
Difficulty 1–3 · 10–60 questions · answer key
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Divisibility rules
Difficulty 1–3 · 10–60 questions · answer key
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Fractions
Difficulty 1–3 · 10–60 questions · answer key
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Decimals
Difficulty 1–3 · 10–60 questions · answer key
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percentages
Difficulty 1–3 · 10–60 questions · answer key
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squares
Difficulty 1–3 · 10–60 questions · answer key
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Rounding and estimation
Difficulty 1–3 · 10–60 questions · answer key
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Classroom ideas
- 2-minute warm-up: project the Daily Challenge — the whole class solves the identical set, then compares grids.
- Fluency Fridays: the 60-second tests per topic make an excellent low-stakes check; personal bests are stored per device.
- Method recognition: the Strategy Trainer teaches choosing the right method — our core educational idea.
- Homework: print a worksheet per student; each sheet differs, so answers can't be copied.