How many pupils are using AI for homework?
Enough that every teacher should assume some of them are. Pew Research Center found that 26% of US teens aged 13 to 17 had used ChatGPT for schoolwork, up from 13% a year before. Older students use it more: 31% in grades 11 and 12, against 20% in grades 7 and 8.
Those are the pupils who say so. In a classroom, the realistic starting point is that AI is in the room, and the useful question is what counts as fair use of it.
How do teachers actually spot AI-written work?
Mostly by knowing their pupils. A teacher who has read a child's writing all term notices when an essay suddenly arrives in a different voice: longer sentences, no spelling slips, a confident tone that does not sound like a twelve-year-old.
The common signs:
- A style that does not match. The work reads nothing like the pupil's classwork.
- Facts they cannot explain. Ask about one paragraph and the pupil goes blank.
- Invented references. Chatbots still make up books, quotes and studies that do not exist. A reference that cannot be found is a strong sign.
- No trail. No notes, no drafts, and a version history that shows the whole piece pasted in at once.
- Generic answers. Correct, smooth and oddly empty, with nothing from the lesson itself in it.
Do AI detectors work?
Not well enough to rely on. Detection tools give a score, not a verdict. They can flag work a pupil genuinely wrote, especially plain or formulaic writing, and they can miss AI text that has been lightly edited. A pupil accused on the strength of a detector score alone has a fair grievance.
The sensible approach is the one good teachers already use for any doubt about authorship: treat the score as a reason to talk. Ask the pupil to explain the argument, to talk through a source, or to write a paragraph on the same topic in class.
What do schools' rules say?
They vary, and many are still being written. In England, the Department for Education says schools may wish to review homework policies and other unsupervised study to account for the availability of generative AI, and it expects schools to decide which tools pupils can use. For coursework that counts towards qualifications, the exam boards' joint body, JCQ, publishes its own rules on AI use and misconduct.
If your child's school has an AI policy, read it with them. Children are far more likely to stay inside a line they can see.
What should parents do?
If your child is tempted, talk about what homework is for. A chatbot can produce an answer, but the point of the exercise was the thinking. A fair rule many families use: AI can help you understand a topic or check your work, but the words you hand in are yours.
If your child is accused, stay calm. Ask the school what it saw, collect drafts, notes and version history, and ask your child to explain the work to you in their own words. Most accusations are settled by that conversation.
Try this at home or in class
Ask a chatbot to write a short paragraph on a topic your child knows well, such as a book they love. Then fact-check it together. Children are usually delighted to catch it out, and they learn the most important lesson about AI: it sounds sure even when it is wrong. Our free AI Ethics and Essays lesson builds a full session around this.
Frequently asked questions
Can teachers tell if you used ChatGPT?
Often, yes, but rarely from a tool alone. A sudden change in style, facts the pupil cannot explain, invented references and missing drafts are the usual signs. Teachers confirm by asking the pupil to talk them through the work.
Are AI detectors accurate?
Not accurate enough to prove anything on their own. They can flag work a pupil wrote themselves and miss work that was AI-written and then edited, so their score should start a conversation rather than end one.
How many students use AI for homework?
In the US, 26% of teens aged 13 to 17 say they have used ChatGPT for schoolwork, double the share in 2023, and it is higher among older students: 31% in grades 11 and 12.
What should I do if my child is accused of using AI?
Stay calm and ask to see what the school saw. Gather drafts, notes and version history, and ask your child to explain the work in their own words. Then ask the school what its AI policy allows.