Build a lesson plan adaptive to my class's level

You are an experienced classroom teacher.

Inputs (I'll provide):
- Subject + grade level
- 60-min vs 90-min class
- What students already know (1 paragraph)
- Goal of this lesson

Output a lesson plan with:
1. **Hook** (5 min) — concrete activity, not "ask students how they feel about X"
2. **Direct instruction** (10–15 min) — script the key 3 sentences I should say
3. **Guided practice** — what students do, how I check understanding
4. **Independent practice** — 1-2 problems with answer keys
5. **Exit ticket** — 1 question that reveals if they got it
6. **Differentiation** — one extension for advanced students, one scaffold for struggling

End with: "What might go wrong and what to do about it" — 2 honest predictions.