5 AI tools actually worth your time as a teacher

By Arnaud R. — trainer & instructional designer · July 2026 · 5 min read

Every week brings a new list of "40 AI apps every teacher needs". You do not need forty apps. Most educators get 90 % of the value from a handful of tools used well — and the discipline to ignore the rest. Here are five that earn their place, and what each one is genuinely good at.

1. One general-purpose assistant — pick one, learn it properly

ChatGPT, Claude, Copilot or Gemini: for most teaching tasks, the differences matter less than your skill in using them. A general assistant excels at first drafts: lesson outlines, differentiated versions of an exercise, parent-friendly summaries, quiz questions across difficulty levels. Choose the one your school supports, and invest an hour in learning to write clear instructions — context, audience, format, example. That hour pays for itself within a week.

2. MagicSchool — the teacher-shaped layer

Built specifically for educators, with ready-made assistants for rubrics, report comments, IEP-style accommodations and behaviour plans. Its value is speed: the prompting is done for you. Its limit: the output is generic by design — always adapt it to your class before it touches a learner.

3. Diffit — differentiation in minutes

Give it a text or a topic; it produces levelled versions of the same material with vocabulary support and comprehension questions. For mixed-ability classes, this is the closest thing to a time machine. Check the reading levels yourself — its idea of "grade 4" and your pupils' reality may differ.

4. NotebookLM — the source-grounded one

Unlike a general assistant, NotebookLM answers only from documents you give it — your syllabus, a policy document, a set of readings. That makes it far less likely to invent facts, and ideal for working with curriculum documents or building study guides anchored in your actual materials.

5. Your word processor's built-in AI

Google Docs and Microsoft Word now embed drafting help where you already work. Underrated for the unglamorous tasks that eat evenings: rephrasing a sensitive email to a parent, tightening a newsletter, summarising meeting notes. No new tool to learn, no new account to create — often the safest option under your school's existing agreements.

What to ignore (for now)

Anything that promises to grade essays unsupervised, detect AI-written work reliably (no tool does), or replace your judgement about a child. Tools change monthly; those three promises have failed consistently.

How to choose your first tool: three questions

If you are starting from zero, do not compare feature lists — ask three questions instead. First: what does my school already pay for? A licensed tool comes with a data agreement, admin support and colleagues who use it; a marginally "better" tool with none of those loses. Second: what task eats most of my evenings? Pick the tool that attacks that task — differentiation points to Diffit, document-heavy prep points to NotebookLM, everything else points to a general assistant. Third: will I still use it in a month? A tool you open daily beats a tool you admire weekly. One tool, one real task, three weeks of honest use — then, and only then, consider a second one.

Match the tool to the task

• Drafting a lesson outline or quiz → a general assistant, briefed with age, subject, duration and constraint.
• Levelling one text for a mixed-ability class → Diffit, with your own check on the reading levels.
• Rubrics, report comments, accommodation ideas → MagicSchool, always adapted before it reaches a learner.
• Questions anchored in your actual curriculum documents → NotebookLM, fed with your syllabus or readings.
• A delicate email to a parent → your word processor's built-in AI, rephrasing your draft, not writing it.
• Anything involving a learner's name, record or photo → no AI tool at all. That task stays human.

Frequently asked questions

What is the best free AI tool for teachers? For most teachers, one general-purpose assistant used well beats any specialized app. The free tiers of ChatGPT, Claude, Copilot or Gemini cover lesson outlines, differentiated exercises, quiz questions and parent-friendly summaries. Choose the one your school supports and learn to brief it properly.

Are AI tools allowed in schools? That depends on your school or district policy, not on the tool. Many districts keep an approved-tools list, and the school's licensed version of a tool usually has a data agreement that your personal free account does not. The safe rule: check who holds the contract before using a tool for anything near learners.

Do teachers need to learn prompt engineering? Not formally. What matters is briefing the tool like a colleague: context, audience, format, constraint, and an example when you have one. One hour of deliberate practice covers most of what a teacher needs — far more useful than memorizing prompt formulas.