Target: compare prokaryotic and typical eukaryotic organisation using DNA location and membrane-bound nucleus, not size or colour alone. Prepare: Cards B/D and comparison mat.
- Launch · 2 min. Give three words: nucleoid, nucleus, ribosome. Ask which names a membrane-bound DNA compartment.
- Model · 4 min. Use the complete Pond bacterium and Leaf mesophyll cards. Both have DNA/ribosomes; only the leaf model has a membrane-bound nucleus and mitochondria/chloroplasts. Say “typical model,” not “every mature cell.”
- Guided reading · 5 min. Compare the Human intestinal lining model as a second eukaryotic example. Identify a nucleus/mitochondria without inferring plant or animal from colour or outline.
- Practice route · 7 min. Choose Day 3 route; make a two-column comparison with one shared feature, one decisive organisational difference and one diagram limit.
- Audit · 4 min. A partner deliberately claims “the unfinished sketch lacks a nucleus.” Learner corrects the claim from its incomplete label.
- Exit · 3 min. “Does having ribosomes make a cell eukaryotic?” Key: no; both model categories have them.