Check the representation
Ask the pupil to locate values and explain the intervals. Compare a labelled line with a partially labelled one. A line with uneven or misunderstood spacing can reinforce an error rather than support calculation.
Free printable activities to try
These free Day by Day Tools activities include a printable pupil page and teacher guidance.
- Rounding number decisions — Locate a number between multiples of ten and justify the nearest choice.
- Time intervals timetable — Find time intervals by counting forward through the hour.
Connect jumps to a strategy
Model a meaningful jump, such as adding ten and then two, and relate it to notation. Let pupils explain alternative efficient routes. Use suitable benchmarks and vary the scale when the concept is secure.
Example and review
For 38 + 12, the pupil shows a jump of ten and a jump of two, then explains why the answer is 50. A changed calculation checks application. Review accuracy, scale understanding and independent strategy choice. Keep a useful line available instead of treating removal of the resource as the only evidence of progress.
Sources and further reading
These sources inform the wider approach. The classroom example illustrates practice; it is not a research case study.
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