The premise of La machine à rajeunir hands teachers an unusually engaging debate question: should such a machine exist, and who should be allowed to use it? Students rarely need convincing to care about this kind of topic. That built-in interest makes it a strong vehicle for teaching argumentative writing, where the skills matter more than the subject.

The assignment works best when students ground their argument in the novel rather than only in general opinion. A claim about the dangers of unlimited youth gains authority when it is supported by what the story actually shows. This pairing of text evidence and reasoning is exactly what many curricula expect from argumentative writing.

Before drafting, spend a class session on the structure of an argument: a claim, reasons, evidence, and a response to opposing views. Many students skip the last element entirely, which weakens otherwise decent essays. Modeling a short example with a different, lower stakes topic helps them see the pattern before applying it to the novel.

Design the Prompt to Require Counterarguments

A prompt that only asks for a position produces one-sided essays. Adding a requirement to address the strongest opposing view pushes students to think more carefully and gives the grader a clear criterion to assess. It also makes the writing more persuasive, because readers trust arguments that acknowledge their weaknesses.

• State a clear position on whether the machine benefits or harms society
• Support the position with at least two pieces of evidence from the novel
• Explain how each piece of evidence connects to the claim
• Present the strongest opposing argument and respond to it
• Close with a conclusion that does more than repeat the introduction

Score Reasoning Separately From Style

A confident, polished essay can hide weak reasoning, while a clumsy one can contain a strong argument. Scoring the logic of the argument as its own criterion helps you reward the thinking rather than being swayed by fluent prose. This is especially valuable when grading in a second language, where fluency varies widely.

AI grading can support this by identifying the claim, listing the supporting reasons, and noting whether a counterargument is present. That structural analysis gives you a quick picture of the essay's logic before you read for style. You can then confirm or adjust the assessment based on your own reading.

Common Mistakes in Student Arguments

Students often confuse a strong feeling with a strong argument, writing forcefully without providing reasons. Others list several weak points instead of developing one strong one, producing a scattered essay. Naming these patterns in class helps students recognize them in their own drafts.

Another frequent error is treating the opposing view as a straw man, presenting a weak version and dismissing it quickly. A useful revision exercise is to ask students to restate the opposing argument in a way its supporters would accept. That habit improves both their writing and their ability to think fairly about disagreement.

Extend the Unit With Peer Debate

A short in-class debate before writing lets students test their ideas against real objections. Pairing students with opposing positions gives them material for the counterargument section of their essays. The discussion also surfaces points that individual students might not have considered alone.

After the debate, a brief written reflection on how their view changed or strengthened can serve as a low stakes formative task. It gives you insight into how students are thinking and provides an easy way to differentiate the instruction that follows. By the time the formal essay is due, students arrive with positions that have already been challenged.