Choose a pretend job for 21 marks. Ask a grown-up to help make full ten-strips and loose ones, then tell them how to show your amount.
- Inspect a strip. Does it really have ten cells, with one mark in each?
- Use two checked full strips and one loose mark. How many strips are there? How many marks do they stand for?
- Show how every represented mark belongs to your whole. You may point or explain while a helper moves or draws.
Point, speak, sign, use AAC or tell a helper where to put the marks. A quiet private try or pause is fine. No photo, returned homework, purchase or independent drawing/moving is needed.
Grown-up help
**Prepare the actual unit.** On existing paper, draw ten separate cells and put one countable mark in each; count the cells and marks together before calling this a full ten. Make a second checked strip and one separate single. A strip is one piece of paper representing its ten marks: count strips and represented objects as different quantities. No printed strip or fine motor task is necessary; the child can direct your marks. **Ordinary model after own thinking.** The original supplied account is 20 + 1 = 21: two verified tens represent twenty marks, with one loose mark. Expand or point through the ten marks in each strip and include the single once to check the represented whole. Do not add the old strip and expanded marks as extra objects. These are supplied teaching marks, not household stock or independent learner results. **Smaller or next.** One checked strip, with an optional manageable number of singles, can rehearse the unit/value distinction; name the actual smaller amount rather than claiming the 21 task was completed. A collection below ten can rehearse one-to-one parts but does not establish full-ten value. If strip count replaces object value, inspect one checked strip before rebuilding the larger account. [Full plan](../teacher/day-44.md). Keep child choices, physical help and maths hints distinct; home return is optional.Original SubjectNest teaching and drawings © NeuroForgeIO Pty Ltd 2026, CC BY 4.0. Credit SubjectNest by NeuroForgeIO Pty Ltd, version 0.1.0, source and licence; note changes. Curriculum and provider rights remain separate.