N24 · Play-map repairYear 2 Maths · T2 W13–14 · Teacher · Teacher / Next / N24

Id

N24

Original component

B-later-Q4

Target criterion

Rejects endpoint-only proof: the proposed path attempts B4, which is expressly closed. An endpoint match does not establish the legality of its preceding path.

New job title

Play-map repair

Source

Fictional paper scene: Play-map repair. There are 5 columns A to E, left to right, and 5 rows 1 to 5, top to bottom. All cells have the same size. Up/down mean towards the top/bottom of this page; left/right across this page. One move reaches one neighbouring cell, never a diagonal. Start: A5. Target: E2. The name-card is at A1; the spare-card is at E5. Closed cells: B5. Do not enter or pass through them. Proposed instruction: 4 cells right, then 3 cells up. A supplied helper says: “Reaching the target proves every preceding step is legal.” This is a supplied scene. Read its whole legend before the questions; it is not a real place, a measured route or an observed journey.

Mathematical data

Invitation

Check the endpoint-only helper claim using the closure rule and all proposed positions.

Teacher moves

Read the exact supplied helper statement on Play-map repair. Show why a geometric endpoint does not authorise a closed preceding cell: mark the first attempted closed location and the rule. Receive a checking explanation before showing the staff possibility.

Worked possible response

Endpoint-only proof fails: first attempted closed cell B5 violates the whole-path rule.

Guided source

Fictional paper scene: Play-map repair—new guided scene. There are 4 columns A to D, left to right, and 4 rows 1 to 4, top to bottom. All cells have the same size. Up/down mean towards the top/bottom of this page; left/right across this page. One move reaches one neighbouring cell, never a diagonal. Start: A4. Target: D2. The name-card is at A1; the spare-card is at D4. Closed cells: B4. Do not enter or pass through them. Proposed instruction: 3 cells right, then 2 cells up. A supplied helper says: “The proposed endpoint makes the whole route legal.” This is a supplied scene. Read its whole legend before the questions; it is not a real place, a measured route or an observed journey.

Guided data

Guided invitation

Check the endpoint-only helper claim using the closure rule and all proposed positions.

Guided staff possible response

Endpoint-only proof fails: first attempted closed cell B4 violates the whole-path rule.

Receive own steps

Read/hear the whole new source and name the actual requested job.

Receive the learner’s own idea in their usual communication before the staff response.

Teach the precise relationship using the separate complete model; name mathematical hints.

Deliver the complete different guided source and invitation. Receive a fresh response before its staff possibility.

Review criterion

Rejects endpoint-only proof with the actual closed-cell evidence.

Observe and next

Record the exact relationship available in the response and the help, leaving absent evidence open. If it is missing, repeat that same relationship on a smaller complete source. If secure, change the scene/quantity or representation explicitly; do not infer annual mastery.

Access

Point, speak, sign, AAC, tactile labels, large marks or exact child-directed scribing/moving. No speed, handwriting, robot, printing or public sharing criterion.

Transfer limit

Different supplied complete new and guided contexts; no remembered original held source or real learner improvement is claimed.

Grant

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