"This isn't your work," she said. Not a question. A verdict delivered in front of the class.

I'll call her Miss Perrin. She was holding my essay at arm's length the way you'd hold something you'd fished out of a drain — printed, A4, double-spaced, which in the mid-nineties apparently constituted suspicious behaviour in an English class. I had been off sick for several days. I had written the essay at home, on the family PC, and printed it out before coming back in. This, it turned out, was the problem.

The essay was about Of Mice and Men. I had opinions about it. Strong ones. Curley's wife, specifically — the way the book asks you to read her as a type rather than a person, and whether that's Steinbeck's point or his blind spot. I'd written about four pages, probably more than was asked for, and I was genuinely pleased with it. There's a particular satisfaction in finishing a piece of writing and thinking: yes, that's what I meant.

Miss Perrin did not share this satisfaction.

The logic, as far as I could reconstruct it, went like this: Stuart is not a student who produces work this polished. Stuart has been off sick. Therefore Stuart did not write this. It was, in structure, a perfectly coherent argument. It had one flaw, which was that it was completely wrong.

I said I'd written it. She said she didn't think so. The class was watching. I said — and I remember this with some clarity — "Fine. I'll go to the head of English now." And then I stood up and did exactly that, which was probably not the most tactically sound approach a fifteen-year-old could take, but it was the one that felt available to me.

The head of English was a man I'll call Mr Croft — quieter, more considered, the kind of teacher who would actually listen before forming a view. I explained the situation. He asked me about the essay, about the argument I'd made, about what I thought about the book. We talked for a few minutes. At some point it must have become obvious to him that I knew the material, because he took the essay, read a section of it, and told me he'd deal with it. He believed me. Whether he spoke to Miss Perrin I never heard.

The irony I've been carrying around since then is this: the thing that made the essay look suspicious was the same thing that made it good. I had more time at home. I had a proper keyboard and a screen I didn't have to share. I had no distractions and a mild fever that seemed, weirdly, to sharpen rather than fog things. The PC didn't write the essay. It just meant I could revise it properly — move sentences around, cut the ones that weren't working, end up with something that didn't look like it had been produced in forty minutes in an exercise book.

Miss Perrin's model of what good work looked like was calibrated to what good work looked like produced under her supervision, in her classroom, with a biro. Anything produced outside that model was, by definition, anomalous. And anomalous meant suspect.

I've thought about this pattern more than once since, because it keeps appearing. The person who produces something better than expected — more carefully structured, more clearly expressed — and is met not with interest but with suspicion. The assumption is always that quality is fixed, that deviation upward is evidence of fraud rather than effort. It's an exhausting thing to be on the wrong side of.

I don't know what grade the essay eventually got. I don't remember whether it was ever returned to me. What I remember is the walk to Mr Croft's office, the slight shaking in my hands, and the decision to go anyway.

Worth it. That much I know.