[ SUBJECTS ]

AI help for essay writing that leaves the writing to the student

An AI can write a passable essay in seconds, and an AI detector cannot reliably tell. How Nexus's class modes keep students writing, and how teachers can see the process.

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Facts as of Oct 18, 2026Last reviewed Oct 19, 20264 min read

61%

of essays by non-native English writers flagged as AI-written by seven detectors, on average

Source: Liang et al., Patterns, 2023

[ ESSAY WRITING ]

What AI does to writing, and what it does not

In a randomized study of 117 university students writing an essay, ChatGPT raised essay scores the most, but knowledge gain and transfer did not differ from the other groups. The authors called it "metacognitive laziness." A better essay is not the same as a better writer.

Feedback is where AI can help. In one study of 459 upper-secondary students learning English, AI feedback on their essays improved revisions (d = 0.19). Human feedback still did better: humans beat ChatGPT on four of five quality measures for 200 secondary essays, by modest margins, and tied on criteria-based feedback. A Hints class uses AI for feedback on the student's own draft, not for the draft itself.

How the three learning modes work in essay writing

Modes describe how a class is set up to respond, and students cannot change a class's mode. AI can make mistakes; before any pilot we check Hints and Guided with real models.

Mode	What the student gets	Good for	Watch for
Hints	Questions about the student's own draft: "Which sentence states your claim?"	Brainstorming, thesis work, revision	Students pasting a prompt and asking for a paragraph
Guided	One stage at a time: claim, evidence, reasoning, counterargument	Structuring an argument essay	Accepting the AI's outline instead of building one
Full answer with critique	A model paragraph with a critique of what makes it work	Analyzing an example after the student has drafted	Model paragraphs reused as the student's own

Learning modes in essay writing

A hint-first exchange

Study assistantHints

StudentWrite an intro paragraph for my essay on whether school should start later.

Study assistantIn this class I can't write it for you, but I can help you build it. What's your position, in one sentence?

StudentSchool should start later because teens need sleep.

Study assistantThat's a clear claim. A reader will ask: how much later, and why does sleep matter for school? Which reason will your strongest body paragraph prove?

StudentThat tired students do worse in first period. So: High schools should start later because students who sleep more are more alert in morning classes.

Study assistantMuch sharper. Now draft an opening sentence that would make a reader care. A question, a scene or a surprising fact you can cite all work.

StudentPicture a classroom at 7:45 where half the students are fighting to stay awake.

Study assistantThat's vivid. Put your three sentences together and read them aloud. Does each one lead to the next?

Illustration: written by the Nexus team to show how a Hints class is designed to respond. It is not a transcript of Nexus output. Real answers vary by model, and AI can make mistakes.

Class instructions teachers can add

Each class can carry the teacher's own instructions on top of its mode. A few that work well here:

"Never write sentences for the student. Comment on their draft instead."
"Ask for the student's thesis before discussing structure."
"Point to one specific sentence in each piece of feedback."
"Ask the student to say which feedback they will use, and why."

Seeing the process, not detecting the product

AI-writing detectors are not a fair check. Seven detectors flagged on average 61% of essays by non-native English writers as AI-written, in a study of 91 TOEFL essays. Nexus does not detect AI-written work. Class chats show teachers how a student worked instead: the questions asked, the drafts pasted, the feedback used. Pair that with in-class writing and short conferences where students explain their choices.

Each assignment keeps its own chats, so a student can come back to the same thread from first draft to final revision, and the teacher sees the whole process in one place.

What students say

63% of teens who use AI for schoolwork get answers from it, and 39% feel they miss out on learning (Common Sense Media, Aug 2026). Many already sense that handing over the writing costs them something. Naming that in class, and giving them a tool that helps without writing for them, is a stronger message than a ban.

[ FAQ ]

Questions and answers

Can students use AI to write essays?

That is your class rule. In a Hints class, Nexus is set up to give feedback on the student's own draft rather than write it.

Do AI detectors work on student essays?

Not reliably. Seven detectors flagged on average 61% of essays by non-native English writers as AI-written (Liang et al., 2023). Nexus does not detect AI-written work.

Is AI feedback on essays as good as a teacher's?

Not quite. In one study, humans beat ChatGPT on four of five quality measures for secondary essays, by modest margins. AI feedback still improved revisions in another study.