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: independently transfer three-set union and mixed branch counting to new H/I. Prepare: blank three-set map and branch tree; neutral support log.
Launch · 2 min. Explain that H/I are new fictional information and the response is public formative evidence.
Source access · 4 min. Give H/I only, with neutral reading or enlarged text as needed.
Independent plan · 5 min. Learner marks the triple, pair-only regions, exclusive branches and complete outcome units.
Independent response · 7 min. Choose Day 10 route; retain first formula, diagram and explanation before content help.
Self-audit · 4 min. Learner checks nonnegative regions, total universe and branch exclusivity.
Submit · 3 min. Collect work/support log; use separate key for next instruction, not a formal unit result.