The appeal of free AI lesson planning tools is obvious. Education budgets are tight, teacher salaries haven't kept pace with inflation, and spending money on software when free alternatives exist requires justification. So what do you actually get for free — and what do you give up?
What free tools typically offer
Most free AI lesson planning tools offer some combination of the following: a limited number of AI-generated plans per month, basic lesson structure (objective, activities, plenary), and a simple editor. Some are entirely browser-based; some require account creation.
Using a general-purpose AI tool like ChatGPT or Claude directly is also effectively free (within the free tier limits), and with the right prompting it can produce reasonably structured lesson plans. Many teachers use this approach.
Where free tools fall short
Usage limits. Most free lesson planning tools cap the number of AI generations per month. A teacher planning five lessons a week needs roughly 200 generations per year. Free tiers typically allow 10–20 per month — enough for occasional use, not enough for regular planning.
No timetable or diary integration. Free tools generate plans in isolation. They don't know your timetable, don't have a diary, and can't link a plan to a specific scheduled lesson. You're managing the connection between "plan I generated" and "lesson I'm teaching Thursday period 3" yourself — in your head, or in a separate system.
No unit planning. Building reusable unit sequences — the most valuable long-term planning habit — requires a tool that stores and structures multi-lesson sequences. Free AI generators produce one lesson at a time with no memory of what came before.
No persistence. Generated plans often live only in the browser session. Copy-paste to a document is the workflow. You're not building a searchable library of your teaching; you're generating and discarding.
Generic outputs. Without class profile data — ability range, behaviour notes, specific SEND needs — AI-generated plans are generic. Purpose-built lesson planning tools store your class context and use it every time you generate. General AI tools start from scratch each conversation.
What paid tools justify
A paid lesson planning tool is only worth the cost if it does things free tools don't. The things worth paying for are: persistent storage and search across your teaching history, timetable and diary integration, unit planning with reusable sequences, class-context-aware AI generation, and differentiation built into the output.
ScholaPlan at £15/year is in a different economic category to the tools that charge £15/month. At an annual subscription cost equivalent to a decent pen, the question is less "can I justify this?" and more "is the tool good enough to use regularly?" The trial period answers that question before any payment is required.
The general AI approach
Using ChatGPT or Claude directly is viable and free. The workflow is: open a new chat, paste in your class profile and lesson requirements, review and copy the output. This produces reasonable lesson plans for a confident teacher who knows what to ask for.
It doesn't produce timetable integration, unit libraries, or a persistent diary. For occasional planning — a one-off lesson, a cover lesson — it's more than adequate. For systematic planning across a full timetable, it's a series of disconnected documents with no organisational structure.
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