用 AI 备一节 45 分钟的课，同时不把课交出去
五个步骤：教学判断留给教师，只把机器真正擅长的部分交给它。
本文尚未翻译成中文，以下正文为英文。
Most disappointing AI lesson plans fail for the same reason: the teacher asked for a lesson plan. That is the one thing you should never ask for first, because the model will happily invent an objective, a class length, a prior-knowledge assumption and a curriculum standard, and you will spend longer auditing those than you would have spent writing the plan.
Give it the constraints instead. Here is the order that works.
1. Write the objective yourself
One sentence, in the form "by the end of this lesson, a student who was paying attention can ___". No AI involved. This is the part that requires knowing your class, and it is the input everything else is judged against.
Be specific about the verb. "Understand photosynthesis" cannot be checked in the room. "Explain why a plant in a dark cupboard dies" can.
2. Give it the source material, not the topic
If you have the textbook chapter, the set text, the syllabus extract — paste it in, or upload it to something that can hold documents and cite them. A model working from your material writes about your material. A model working from a topic name writes about the internet's average version of that topic, which is where the wrong curriculum standards come from.
3. Ask for the shape, then argue with it
Ask for a sequence with timings for your actual lesson length and class size: opening, input, practice, check, close. Not prose. Not slides yet.
Then push back on it properly. The first draft is almost always front-loaded — too much explaining, not enough student work. Say so: "the students are silent for 28 of these 45 minutes, rebalance it."
4. Build the check for understanding before the slides
This is the step people skip, and it is the step that makes the plan real. Ask for four questions that a student who half-understands would get wrong. Then read them and cut two. Question generation is cheap; question quality is not, and you are the only one in this exchange who knows what half-understanding looks like in your room.
5. Only now, generate the materials
With a settled sequence and a settled check, the slide deck, the worksheet and the handout are formatting jobs — and formatting is what these tools are genuinely good at. Hand over the outline you have already agreed and ask for the artefact.
What to keep out of it
- The objective. Yours.
- The final question set. Yours, after editing.
- Anything claiming a standard or curriculum alignment. Check it against the actual document. This is the single most common fabrication in generated lesson plans.
- Student names and student work. Do not paste them into a general assistant. If you want AI feedback on real student writing, that is a procurement conversation about data handling, not a personal-account conversation.
The honest time saving
Steps 3 and 5 save real time — perhaps half an hour on a lesson you would otherwise build from scratch. Steps 1, 2 and 4 do not save time at all. They are what stops the other two from producing something that looks like a lesson plan and teaches nothing.