• Analogy template
• Content notes or reference materials
• Sample analogies for modeling
• Peer review checklist

Prepare analogy templates with structure: '_____ is like _____ because _____'. Collect example analogies at various quality levels. Plan which concepts students will create analogies for.

1. Introduce analogies: Comparing something unfamiliar to something familiar to help understanding.
2. Model: 'A cell membrane is like a security guard because both control what enters and exits.'
3. Explain the structure: What (concept), Is like (familiar thing), Because (specific comparison).
4. Show how to extend: 'The security guard checks IDs like the membrane checks molecules. Both let some things in and keep others out.'
5. Show a weak analogy: 'A cell is like a box because it holds stuff.' Why is this weak? Too general, not specific.
6. Assign cell parts: mitochondria, nucleus, ribosomes, etc. Each student creates an analogy.
7. Writing time (10 min): Draft your analogy with at least two specific comparison points.
8. Peer review: Partner evaluates using checklist - Is it accurate? Specific? Does it help understanding?
9. Revise based on feedback.
10. Gallery walk: Post analogies. Vote on most helpful ones.

Provide analogy bank of familiar comparisons. Allow pairs for struggling students. For advanced students, require explaining both similarities AND limitations of their analogy.

Evaluate accuracy of the comparison. Check that the analogy illuminates rather than confuses. Listen for sophisticated reasoning about similarities and differences.