# How to Tell If Your Child Used AI for Homework

**Author:** Dan Fitzpatrick
**Canonical URL:** https://parents.theaieducator.io/posts/how-to-tell-if-my-child-used-ai
**Published:** 2026-09-23T07:21:45.000Z
**Updated:** 2026-09-23T07:21:46.993Z
**Category:** Homework and Learning

## TL;DR

You mostly cannot tell from the work, and neither can detection software: in a test published in the International Journal for Educational Integrity on June 29, 2026, Turnitin, Copyleaks and GPTZero caught none of the papers written entirely by AI on the strict measure. What tells you is whether your child can go one step past the finished piece. Tonight, ask them a question the work does not answer, and keep the tone flat. If the school has already raised a concern, its process comes first, and ask what that concern rests on besides a score.

## Key takeaways

- Ask one question a step beyond the homework that the finished work does not answer. A child who did the thinking can usually go further straight away.
- Do not open with an accusation. "Show me the bit you're proudest of, and why" gets you further than "did you cheat", which only buys a denial.
- Treat a detector score as a flag and never a verdict. In a June 2026 test, the three most widely owned tools caught none of the fully AI-written papers on the strict measure.
- Long words, semicolons and a change of tone are weak signals at home. A teacher has a term of your child's writing to compare against; you have a feeling.
- Ask your child's school what it would look at before contacting a family about AI, besides a score. The answer tells you what kind of school it is.

## Article

Mostly you cannot, and neither can the software schools buy. The writing gives up less than people think, and the tools sold to catch it miss a great deal. What tells you is not in the work at all. It is whether your child can still do, away from the screen, the thing the homework was for. If the school has already raised this, its process comes first.

That is the short answer, and it is not a counsel of despair. It moves you off a question you cannot settle and onto one you can settle in a minute at the kitchen table.

## Can you tell from the work itself?

Less reliably than you think, and the signs most parents reach for are the weakest ones.

Long words are not evidence. Nor is a sudden burst of semicolons, nor a formal tone. Those get repeated as red flags because they are easy to describe, not because they work. Children read, copy, imitate and grow, and a fourteen-year-old who has just discovered that sentences can have a rhythm will write something that does not sound like last term's fourteen-year-old. That is called learning to write.

There is a number for how well parents do at this. Common Sense Media surveyed 1,045 US parents and their 13 to 18 year olds and reported on [September 18, 2024](https://www.commonsensemedia.org/press-releases/new-report-shows-students-are-embracing-artificial-intelligence-despite-lack-of-parent-awareness-and) that among parents whose teenager had used generative AI for school, only 37 percent believed their child had done so. Nearly half of those teenagers had used it without their teacher's permission. That survey is two years old and the tools have spread a long way since, so my own reading is that 37 percent is the optimistic end. It is not a comment on those parents. It is a comment on how little a finished piece of homework reveals.

The English exam boards publish their own list of what teachers should notice, and it is worth reading precisely because it is so modest. The Joint Council for Qualifications, in its guidance on [AI use in assessments dated April 2025](https://www.jcq.org.uk/exams-office/malpractice/artificial-intelligence/), tells teachers to look for vocabulary out of step with the qualification level, citations that cannot be verified, a style unlike the student's previous work, content that is oddly generic, and American spellings in the work of a student who does not use them. That last one is a good illustration of the difference between a teacher's list and a parent's. A teacher has thirty samples of your child's spelling to compare it against. You have a memory of how they wrote in Year 7 and a strong feeling. The same clue is worth a great deal in one pair of hands and very little in the other.

Then the guidance says the thing that matters most: detection tools "vary in accuracy," teachers "will know their students best," and a tool's output is one input among several, never the determination on its own. The exam boards, who have every reason to want a clean test, do not claim there is one. In the United States there is no national equivalent, so the rule your child is actually held to is the one their district or school wrote, which is why the last section of this article is about asking for it.

## Do AI detectors catch it?

Often not, and the newest evidence points the opposite way to the worry most parents have.

Marijke Van Vlasselaer, Filip Van Droogenbroeck and Bram Spruyt ran four detectors over 160 academic papers assembled for the test: some written by people, some by AI, some a mix of the two. Their results were [published in the International Journal for Educational Integrity on June 29, 2026](https://link.springer.com/article/10.1007/s40979-026-00226-w). On the strict measure, against papers written entirely by AI, Turnitin, Copyleaks and GPTZero caught none of them. One newer tool, Pangram, caught 65 percent. All four were close to perfect on the papers people had actually written.

Two things follow, and parents tend to expect only the second.

The first is that the tool a school is most likely to own is the one most likely to miss. The second is the older worry, that these tools wrongly accuse honest children, and that one is real but narrower than it was: in this test three of the four produced no false positives at all. Note the population, though. These were university-level papers, not a Year 9 homework, and an earlier study of 14 tools by [Debora Weber-Wulff and colleagues, published in December 2023](https://link.springer.com/article/10.1007/s40979-023-00146-z), found none of them above 80 percent accurate and found that running AI text through a paraphrasing tool dropped detection to around 26 percent. Their conclusion was blunt: the tools are "neither accurate nor reliable."

Put those together and you get the honest position. A detector can miss a piece written entirely by a machine, and it can flag a child who wrote every word. If your child's school sends you a score and nothing else, [what to do about that is its own situation](https://parents.theaieducator.io/posts/child-accused-of-using-ai), and the short version is that a score settles nothing on its own.

None of which helps you tonight, because you do not have a detector and you should not want one.

## The Next Question Test

There is a check that works, and it takes a minute.

**The Next Question Test is one question to ask when you suspect AI did the work: ask your child something one step beyond the task, that the finished piece does not contain the answer to. Not "did you write this?" A child who did the thinking can usually go one step further straight away. A child who did not will stop, and you will both know, without anyone having accused anyone of anything.**

If the essay argues that Macbeth is undone by ambition, ask which other character wants something badly and what stops them. If the write-up explains photosynthesis, ask what would happen to the plant in a cupboard. If the answer sheet solves for the area of a circle, ask them to estimate the area of the kitchen table before they measure it. You are not testing recall. You are testing whether the thinking the task was built to grow actually happened somewhere.

The reason this works is that AI produces the product and leaves the child exactly where they started. The gap shows up one step past the page, every time, and it shows up whether or not anybody used a chatbot: a child who copied a friend's work, or who drifted through an hour of it, fails the same question. That is a feature. You are checking the learning rather than prosecuting the evening.

There is a companion to it for when the work is already finished and you want to hear the child behind it. [The Show Me Again Test](https://parents.theaieducator.io/posts/child-accused-of-using-ai) is the one I give parents whose school has raised a concern: ask your child to talk you through the piece of work, out loud, without the document open. Not the sentences. The choices. Why that example, why that order, what they cut and why. The two checks do different jobs. One asks what they made. The other asks what they can now do.

> You are trying to find out what happened last night. The thing worth knowing is what your child can do tomorrow.

## What I See in Schools

The teachers who are best at this are not the ones with the best software.

Having read and marked a lot of children's writing before I ever trained anyone on AI, I can tell you the thing that gives a piece away is almost never the vocabulary. It is the mismatch. A teacher reads two hundred sentences by the same child over a term and builds a model of them without meaning to, and then something arrives that does not fit the model. The good ones then do the obvious thing, which is to ask the child about it, in a conversation and not an accusation. The detector, where a school has one, gets run afterward to check a feeling that already existed.

The pattern I see most often is a school that has bought a tool and not decided what it means. Staff are told AI use is a problem, given a number between 0 and 100, and left to work out what number justifies a phone call home. That is not a technology gap. It is a training gap, and it produces both kinds of unfairness at once: children who get away with it and children who get accused without evidence.

You are entitled to know which kind of school you are dealing with, and it is a fair thing to ask at a parents' evening. [What the school is doing with AI](https://parents.theaieducator.io/posts/how-is-ai-used-in-schools) is a reasonable question, and so is "what would you look at before you contacted me about this?" A school that can answer that has thought about it. A school that says "we run everything through the checker" has not.

## What to say tonight, and what not to say

Open on the work, not on the suspicion. The accusation costs you the conversation and buys you nothing you did not already have.

**You could say:** "Show me the bit you're proudest of in this, and tell me why."

**You could say:** "I want to ask you something about this one, not because you're in trouble. What made you pick that example?"

**You could say, if AI did come up:** "Okay. Which part did it do, and which part did you? I'm not cross. I want to know where you are with it."

What not to say is "did you cheat," or "I know you used ChatGPT." Both invite a denial, and a denial closes the subject for the rest of the year. If it turns out AI did the work, the useful response is not a punishment: it is to agree what it may do next time, which is where [the line between help and doing the work](https://parents.theaieducator.io/posts/is-using-ai-for-homework-cheating) is worth settling together. Let AI help with the doing; keep the thinking with your child.

One more thing worth knowing before you go looking for proof. You mostly cannot read the chats. Parents ask me this constantly, and [what you can and cannot see of a child's ChatGPT history](https://parents.theaieducator.io/posts/can-parents-see-chatgpt-history) is narrower than most people assume, which is another reason the conversation beats the search.

## How this differs by age

**Under 8.** This is not a cheating question yet. If a seven-year-old's reading log sounds like a book review, they have had help, and the help is usually a well-meaning adult. Sit next to them for the work rather than checking it afterward.

**8 to 12.** The usual route in is a homework app or a search box that now answers in prose without anyone choosing that. Ask what they typed, and ask them to tell you the answer in their own words before they write it down. At this age you are building the habit, not policing it.

**13 to 15.** This is where suspicion actually lands, and where the accusation does the most damage. Use the Next Question Test and keep the tone flat. Agree, out loud, what AI is allowed to do for their homework, and write it down somewhere both of you can point at.

**16 to 18.** Treat them as the adult they nearly are. The argument that lands is not a rule, it is the consequence: the exam hall, the interview and the first job are all one-step-past-the-page tests, and nobody will be marking the document. If coursework is involved, the school's declaration rules apply and the penalties are real.

## What no check can guarantee, and when to stop

None of this gives you certainty, and you should be suspicious of anything that promises it.

A child can pass the Next Question Test having used AI to tidy their sentences, which is fine and is not what you were worried about. A child can fail it having written every word themselves, because they were tired, or because they never understood the task in the first place. That second case is worth more than catching anyone. A child who cannot go one step past their own finished work has a learning problem that predates the chatbot, and the answer is the teacher, not a stricter rule at home.

Three things take precedence over anything in this article. If the school has a process running, follow it, and ask what the concern rests on besides a score. If your child's school or exam board has a declaration rule for coursework, that rule is the one that counts, not your family's view of it. And if what you are actually seeing is a child who has stopped being able to face any work at all, that is not a homework problem, and the school's pastoral lead or your pediatrician is a better first call than another conversation about a chatbot.

## The next step

If your child's school has never told you what it looks at before it contacts a family about AI, that is worth asking at the next parents' evening, and it is usually a training question rather than a policy one. [Training school staff to handle this properly](https://theaieducator.io/ai-training-for-schools?utm_source=parents.theaieducator.io&utm_medium=referral&utm_campaign=how-to-tell-if-my-child-used-ai) is the work I do with schools, and it is worth sending to a head of year. I also write a [Sunday newsletter](https://theaieducator.io/?utm_source=parents.theaieducator.io&utm_medium=referral&utm_campaign=how-to-tell-if-my-child-used-ai#newsletter) that keeps teachers and parents up to date without the panic. Parents are very welcome.

*Dan Fitzpatrick is a former teacher and assistant headteacher who now helps schools and governments work out what to do about AI. [More about Dan](https://theaieducator.io/about?utm_source=parents.theaieducator.io&utm_medium=referral&utm_campaign=how-to-tell-if-my-child-used-ai).*

## Frequently Asked Questions

### Can a teacher tell if my child used AI?

Sometimes, but rarely from the text on its own. What usually triggers it is a mismatch between the work and the child the teacher has been reading all term, and the good ones then ask the child about it rather than running a checker first. England's exam boards say the same thing in their April 2025 guidance: teachers know their students best, and a detection tool is one input among several.

### Do AI detectors work?

Not well enough to act on alone, and the failure runs the way most parents do not expect. Tested in June 2026, the three tools a school is most likely to own missed every fully AI-written paper on the strict measure, while producing almost no false accusations. So if a score lands in your inbox, the useful question is not whether the number is right. It is what else the teacher saw, because a school that can only point at the number has not looked at your child yet.

### Should I just read my child's ChatGPT history?

You mostly cannot, and it is a weaker move than it sounds. Parents have far less visibility into a child's chat history than they expect, and a search that turns up nothing proves nothing, because the same answer can be reached in a dozen other apps. The conversation gives you more than the audit.

### Is using AI for coursework malpractice in the UK?

It can be. For GCSE and A level work assessed by the exam boards, the Joint Council for Qualifications requires a student to declare AI use, name the tool, give the date and keep a copy of what the AI produced. Failing to declare it is malpractice, and the penalties are real. In the United States there is no national rule, so the one that binds your child is their school or district policy.

### What if my child did use AI? What should I do?

Agree what it may do next time rather than reaching for a punishment. The useful line is which part of the task AI touched: help with the doing is fine, doing the thinking is not. Settle that out loud, write it down, and check the learning again in a fortnight.

### What if my child wrote it themselves but cannot answer the next question?

Then you have found something more useful than a cheat. A child who cannot go one step past their own finished work did not understand the task, and that is a conversation for the teacher rather than a stricter rule at home. Tell the teacher what you saw; it is the kind of information they rarely get.