Task: write a lesson plan on [topic] for a classroom where students have mixed abilities.

Include:
- differentiated activities
- instructional scaffolds for students who need extra support
- extension opportunities for advanced learners
- flexible grouping strategies
- clear actions for the teacher and clear tasks for students
- practical differentiation strategies that can be applied immediately

Constraint: all students pursue the same essential learning objectives, while each engages with the content at a level of challenge that suits them.