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: Convert Card C's need into two checkable paper-prototype criteria and distinguish a requirement needing later measurement. Prepare: Card C, Problem to criteria.
Launch · 2 min. Show three identical unlabelled boxes; ask what the sorter would inspect. Model · 4 min. “Exactly three spaces, each named in words” can be checked on paper. “Real tools fit safely” cannot be checked without dimensions/testing; list it as an open verification. Guided reading · 5 min. Identify label size versus compartment area as a tradeoff; do not assert a fit. Practice route · 7 min. Use Day 4 choices for two criteria, one constraint and one evidence gap. Audit · 4 min. For each criterion ask “show me where I would look on a prototype”; tighten vague “easy” language. Exit · 3 min. Students identify one thing a real stakeholder might decide differently.
