For teachers and learning groups
A short activity, not another school platform
Use one app for a five-minute warm-up, paired practice or a calm individual task. No class roster or required student account is needed.
Choose by learning goal
Four focused tools
Kalkulko for a timed arithmetic warm-up
Select operations, number range and round length. A six-digit room code gives two devices the same set of problems without creating classroom accounts. Use the result as feedback, not as a grade.
Zlomko for visual fraction practice
Use parts of a whole, number lines, equivalent fractions, comparisons and practical situations. The interface supports nine languages. Calm mode has no timer; timed mode stores only a local, nameless leaderboard.
Propisko for calm printed-letter tracing
Children trace printed letters, numbers and short words in five interface languages. It has no score, timer or leaderboard. It supplements explicit handwriting teaching and pencil-on-paper practice; it does not replace them.
Pravopisko for Czech spelling
Pravopisko covers eight Czech spelling topics in Learn and Challenge modes. It is suitable only when Czech spelling is the learning goal; no curriculum alignment or school endorsement is claimed.
A practical five-minute routine
- Choose one already taught skill and a short round.
- Let children complete the activity before comparing answers or time.
- Use calm mode or tracing when a timer is not useful.
- Discuss one error pattern instead of treating the result as a grade.
- Stop after the clear finish; another round is optional.