SubjectNest · Year 3 maths · Make it fit, then check
Home 25 · A benchmark you know
Try one tiny turn.
Prepare: One checked familiar 10 cm strip, or its described length.
Invitation: Compare a proposed 26 cm paper line with the benchmark. Make an estimate before any real reading, then say what needs checking for exact fit.
Adult worked model/check: About two-and-a-half 10 cm lengths suggests around 25 cm; that is not an exact 26 cm measurement.
Choice and boundary: Avoid treating finger width as a universal unit; describing/directing is welcome.
Usual communication, exact scribing, private/untimed work and stopping are welcome. Keep a model answer separate from your child's own attempt; do not correct it silently. Observe one useful reason and choose a new unrelated example if wanted.