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Day 2 — One change makes a clearer comparisonYear 2 Science · T1 W1–2 · Teacher · Teacher / Day 02

Teaching purpose

Plan and run a small action comparison: a flat piece and a folded piece starting with matched paper, size and history. Use a useful display purpose instead of repeating the predecessor’s loaded bridge test.

Taught prerequisites: Day 1 distinguishes material/action/result and captures a prediction. If missing, rehearse that on a spare before planning, leaving the new result unknown.

Prepare: Two clean same-source same-size paper rectangles, fresh spares, a tabletop outline and large equal paper unit strips. No loads, pins, scissors, structural claims or speed race.

Partial opportunity codes: AC9S2U03, AC9S2I01, AC9S2I02, AC9S2I03, AC9S2I05; whole meanings and limits.

Suggested 35-minute script

1. Recall · 3 min. Ask what yesterday’s note really showed. A supplied account stays supplied. Choose a display question such as whether a fold helps a label stand after hands are removed.

2. Plan · 5 min. Lay out two matched fresh sheets. Say, “We want the action to differ. What else should match?” Mark source, starting size, table and previous folds. Keep one flat and fold the other. For a named different-material question, match relevant size/action/history instead; do not teach that every fair test must use only one material.

3. Rehearse · 7 min. Demonstrate placing a spare gently and stopping if it slips or paper edges are uncomfortable. Model informal measurement using equal paper units laid end to end across the chosen tabletop outline, no gaps or overlaps. Explain this is a viewed width, not a claim that paper disappeared.

4. Try your chosen comparison · 10 min. Choose a context. Predict from a prior note, then perform or direct the locally approved placement. Record flat and folded separately, including fallen, no clear difference or not tried. If repeating would answer an unresolved question, choose a matched fresh piece; repeat is useful evidence, not a required trial count.

5. Read the evidence · 7 min. Use the blank two-record table. With guidance, compare prediction and available records. Ask what actually differed and whether an extra change could matter. If paper creased during the test, preserve that history. A one-off stand result says nothing about outdoor wind or heavier objects.

6. Close · 3 min. Communicate one result with a condition and one unknown. Next teach a missing kept condition or same-unit placement, not neatness or how quickly a tent stood.

Three useful context choices

Choose one; the three are alternatives, not a completion quota. Contexts and their supplied accounts are original fiction unless a particular factual source is named. Real results replace fictional values on actual routes.

1. Mini gallery label

Choose the reader position for a fictional drawing-gallery label. Invented matched-paper account: flat A lies on the table; tent-fold B stands after removal of hands. Both began as equal fresh paper on the same table. Whether a distant reader can read it was not tested.

2. Game-turn marker

Choose a symbol for an invented tabletop game. Invented account: matched flat and folded signs both slip on a smooth board. A helper wants to replace that with “the fold worked”. Keep both slips and ask about the surface; do not erase them.

3. Reading-corner title

Choose a book title invented by you. Invented account: A is fresh small paper left flat; B is a larger previously creased sheet folded upright. B stands. That account varies size/history as well as action; propose matched fresh sheets before attributing the difference to folding.

Participation and evidence

The child can choose the question, arrangement, stopping point or communication. Offer own approved action, learner-directed adult action or complete source interpretation; these do not supply the same practical evidence. Quiet/private/AAC/signed/pointed/exact-scribed routes are available. Adult records operator, actual channels, supplied account/model, neutral support and scientific prompts separately. Guided comparison is appropriate; no fixed learning-style labels or prescribed outcome.

Notice, then teach

Criterion: Question identifies intended difference and relevant kept conditions; actual conduct is recorded only when seen; same informal unit/view is retained if measured.

Next teaching: Lay two setup sketches beside each other and mark every difference; reteach matching for the named question. Recheck with a new paper display, not another loaded bridge.

Child card · ordinary complete source choices · matching aid and full alternative · home · two optional extras.

Original SubjectNest prose, fictional data and vector art © NeuroForgeIO Pty Ltd 2026, Codex assisted. CC BY 4.0. Credit, link the licence and indicate changes. External curriculum and source terms stay separate.