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: Frame a bounded problem with stakeholder, needed function, existing design and constraints. Prepare: Card B, Problem to criteria.
Launch · 2 min. Contrast “make a nice sign” with a problem that names whom it serves. Model · 4 min. Draft: “How might a doorway reader find either side room using an A4 black-print board when the present L/R plan has no legend?” Mark A4/black print as brief constraints, not universal rules. Guided reading · 5 min. Learners test whether a loudspeaker-only idea would meet the scripted performer's stated need; it would not. They identify one unknown (sightline). Practice route · 7 min. Use Day 3 choices to make one problem sentence, two constraints and one question. Audit · 4 min. Remove invented dimensions or diagnoses; specify both destinations. Exit · 3 min. Peer/teacher asks “Could I tell when you solved this?” If not, identify a future criterion.
