Speed drill
Type an answer and the next sum appears the moment it is right. Nothing slows you down, so your score is your speed.
Arithmetic PracticeHopper Labs
Get quick at sums in your head.
Drill against the clock, learn the tricks that make hard sums easy, and see every fact you know timed. Every miss stays until you have learned it.
What makes it useful
Four ways to practise, and nothing forgotten.
Tricks
Read one of twenty-two tricks, worked in steps, and practise it on six sums. Do 65 squared or 47 × 53 in a few seconds.
Guided practice
Answer at your own pace; a miss is explained and worked in the head. Learn the method, not just the answer.
Flash cards
Turn a card and say how it went; it comes back when it is due. Spend time only on the facts you do not yet know.
Fact stats
See the times table as a grid, darker where a fact is slower. Know exactly which facts to work on.
Error log
Retry each miss until it is right on two separate days. Mistakes are learned, not forgotten.
A closer look
See what you can do.
The capability, the action, and what it means for you.
| Feature | What you can do | Why it matters |
|---|---|---|
| Speed drill | What you can doType an answer and the next sum appears the moment it is right. | Why it mattersNothing slows you down, so your score is your speed. |
| Tricks | What you can doRead one of twenty-two tricks, worked in steps, and practise it on six sums. | Why it mattersDo 65 squared or 47 × 53 in a few seconds. |
| Guided practice | What you can doAnswer at your own pace; a miss is explained and worked in the head. | Why it mattersLearn the method, not just the answer. |
| Flash cards | What you can doTurn a card and say how it went; it comes back when it is due. | Why it mattersSpend time only on the facts you do not yet know. |
| Fact stats | What you can doSee the times table as a grid, darker where a fact is slower. | Why it mattersKnow exactly which facts to work on. |
| Error log | What you can doRetry each miss until it is right on two separate days. | Why it mattersMistakes are learned, not forgotten. |
6 capabilities
Practical details
- Ways to practise
- Speed drill, guided practice, flash cards, tricks
- Availability
- Runs in your browser; also a local domain app
- Data
- Kept in your browser only
Trying the experience
Runs entirely in your browser; nothing is sent anywhere. It is practice, not an official assessment.
- Press Start drill, type each answer, and watch the next sum arrive.
- Open Tricks, read one, and practise it on six sums.
- Open Stats to see each fact you met, shaded by how long it took.
Arithmetic Practice