Teacher copy: This page may include teaching prompts or answer keys. Answer keys in this public library can be viewed by anyone. Give learners a clean prompt, use checks as formative evidence, and change a case locally when prior access matters.
Target/codes: compare a thin and thick line with direction/endpoints held; AC9AVAFD01, AC9AVAFC01. Prepare:B width choices, broad strips, B.
Welcome · 3 min. Revisit straight lines. Show a thin and thick line pointing the same way.
Model · 4 min. Overlay the two strips at left/right endpoints; explain that width is the single changed feature.
Try together · 5 min. Let a child direct which strip sits on top of an invented paper notice. Ask what stayed.
Child choice · 7 min. Child chooses width for a fictional sign arrow or book divider, by drawing, raised strip or adult direction, and states intended focus.
Notice · 4 min. Compare endpoints and widths; accept a child preference without demanding a feeling word.
Close · 2 min. Save both, labelled by the child's choice, for a new shape arrangement.
