# Three jobs, one collection

Invent three jobs for the supplied ordinary 17 marks: perhaps start, next and save. Use three separate places, or tell a helper where each mark should go.

1. Name or point to all three places before moving any marks.
2. Put every one of the 17 marks in exactly one place. Show or tell how many each place contains.
3. Check all three parts against the same whole. If you want, move marks to make another three-part plan and check again.

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.

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**Prepare and follow the child.** Provide seventeen countable marks and three distinct outlined/word-labelled regions with a separate waiting place. A helper can draw/move as directed. When a mark leaves waiting, it gets one region; a mark moved later leaves its old region. Include the third region in the check even if the child deliberately leaves it empty and names zero. Two places alone are not this three-part invitation.

**Ordinary model after own thinking.** The retained supplied account is 5 + 5 + 7 = 17. Show five in start, five in next and seven in save, include each member once and recount across all three. Other child-chosen valid three-part accounts are welcome; parts need not be equal. A supplied model is not an independently found split.

**Smaller or next.** Choose a smaller actual collection if useful while keeping three clearly named parts, and identify the actual quantity. An imagined instruction is a plan, not an observed physical arrangement. If a part is omitted, return to one manageable waiting collection and direct each member once. [Full plan](../teacher/day-47.md). First ideas, access help and hints stay distinct; sharing/return is optional.

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