The complete teacher guide to AI-assisted lesson planning
How to use AI tools to cut your planning time in half without losing your voice or compromising on quality.
Sarah Mitchell
Head of English, London
Why planning takes so long
Most teachers spend 2 to 4 hours per lesson plan. The research, the differentiation, the sequencing, the starter activity — it all adds up. AI tools like Pencil cannot replace the teacher's knowledge, but they can handle the structural scaffolding so you can focus on what only you can do: knowing your students.
What AI is actually good at
AI is excellent at generating frameworks. Give it your topic, year group and key stage and it will produce a coherent lesson structure in seconds. What it cannot do is know that Year 9B need more movement breaks, or that three students in the front row are still shaky on last week's vocabulary.
The sweet spot is using AI for the 60% of planning that is structural — and spending your time on the 40% that requires human judgment.
A practical workflow
Start by using the Lesson Plan Generator with your topic and learning objectives. Review the output critically — adjust the timing, swap an activity that does not fit your class, and add your own examples. The result is a solid plan in under 20 minutes instead of 90.
Differentiation made faster
The hardest part of planning is differentiation. AI can generate Foundation, Core and Extension versions of any task simultaneously. What used to take 30 minutes now takes 30 seconds — giving you more time to think about which students need which version.
Keeping your voice
The biggest concern teachers have is losing their teaching identity to AI. The solution is to treat AI output as a first draft, not a finished product. Your annotations, your examples, your instincts about pacing — these are what make a lesson plan yours.
Try the tools mentioned in this article
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