Access
Read or sign the exact source and prompts neutrally, enlarge them, or scribe the learner’s chosen words. A figure, operation, regrouping, equation role or check supplied by an adult is mathematical help and is recorded as such. Show, draw, type, sign or use usual communication. One component can be enough; pause/pass/finish are choices. Four own spaces are genuinely empty. Models, criteria and next lessons stay on separate staff pages.
Complete different guided source
A fictional poster plan needs 700 labels; 348+175 available.
Complete new source
An imaginary badge plan needs 650 badges; 287 and 196 available.
Complete own invitation
A pretend game needs 800 cards; 456+187 available.
Entry and teach
Use count up to a target or exact subtraction, not subtract each pile from target separately then add gaps.
Guided instruction
523 available, 177 needed. Invite each relationship before the answer; teach missing facts and name help.
Id
NEXT18
Materials
Broad paper/empty bar or line/place-value headings as useful; usual communication; no actual stock/handling/purchase.
Observe and follow up
Receive one available own relationship before staff possibility. If it matches criterion, offer another small new context later; this is not automatic mastery. If not, return to the entry relationship and fade one hint. Record the actual mathematical help. If access/time is not available, change access or sitting rather than marking wrong.
Relationship to check
Teach the observed missing relationship in a new ordinary domain; not an answer repetition or further held item.
Session sequence
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Read the new source and name units/wanted quantity. Use count up to a target or exact subtraction, not subtract each pile from target separately then add gaps.
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Model on separate adult paper. 483 available; 650−483=167 needed.
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Guide a different complete source. A fictional poster plan needs 700 labels; 348+175 available. 523 available, 177 needed.
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Receive one own attempt. A pretend game needs 800 cards; 456+187 available. Staff reference only: 643 available, 157 needed.
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Compare available work with: Exact available count and one properly interpreted gap are valid. Choose one follow-up offer; never infer independence from a copied model.
What to look for
Exact available count and one properly interpreted gap are valid.
Staff own possibility
643 available, 157 needed.
Teacher model
483 available; 650−483=167 needed.
Timing
An adjustable 10–20 minute ordinary lesson, unpiloted; split/stop after one useful part.
Title
Calculate the gap