Teaching Argumentative Writing: What Students Need to Know and How to Build It

Argumentative writing is the most academically consequential writing skill secondary students can develop and the one that most secondary writing instruction fails to teach well. Students who can construct a specific claim, support it with evidence, explain the reasoning connecting evidence to claim, and address counterarguments have a transferable skill that serves them in every academic context they'll encounter. Students who can produce essay-shaped text without knowing how to argue have a performance they'll struggle to transfer.

The failure mode is familiar: students are assigned argumentative essays, the essays come back with marks, and the cycle repeats. The instruction in the middle — what students are supposed to learn about how arguments work — is often absent or so brief it doesn't change what students do.

What Students Actually Need to Know About Argument

An argument has a structure that can be taught. Before students can write argumentative essays fluently, they need to understand each component:

Claim: A specific, contestable assertion about the world. "Shakespeare was an important playwright" is not a claim — it's an evaluation everyone agrees with. "Shakespeare's use of doubled characters in Twelfth Night reflects anxieties about social mobility in Elizabethan England" is a claim — specific, contentious, and requiring evidence.

Most student thesis statements fail at this level. They are either too obvious to be worth arguing ("social media has effects on teenagers") or too vague to be supported ("Romeo and Juliet has important themes"). Teaching students what makes a claim arguable — and giving them practice generating specific, contestable claims — is prerequisite to everything else.

Evidence: The specific data, examples, quotations, or facts that support the claim. Evidence must be genuinely relevant to the specific claim, not just generally related to the topic. Teaching students to select evidence involves teaching them to ask "does this evidence specifically support this claim, or does it just relate to the general topic?"

Reasoning: The explicit explanation of how and why the evidence supports the claim. This is the most consistently missing element in student writing. Students list evidence and expect the connection to be obvious; academic writing requires making the connection explicit.

The "because" test: "This evidence supports my claim because ___." Students who can complete this sentence for each piece of evidence they cite understand the reasoning requirement; students who can't are writing evidence summaries, not arguments.

Counterargument and rebuttal: Addressing the strongest objection to the claim — not dismissing weak objections, but engaging with the most compelling reason to disagree — demonstrates that the claim has been tested against challenge.

Building Toward Fluency

The progression that works:

Step 1: Sentence-level practice. Before paragraphs, practice claim-evidence-reasoning at the sentence level. One claim. One piece of evidence. One sentence of reasoning. Students who can write this unit correctly can learn to build paragraphs; students who can't need more practice at the unit level.

The CER (Claim-Evidence-Reasoning) framework provides a structure for this. Students write a single claim sentence, a single evidence sentence (with citation), and one or two reasoning sentences. Feedback at this level catches structural problems before they scale up.

Step 2: Single-paragraph arguments. A single claim with multiple pieces of evidence, reasoning for each, and a concluding sentence that connects back to the claim. The paragraph is a complete argument, not an introduction to a longer essay.

Step 3: Multi-paragraph essays with counterargument. Once students can write paragraphs with clear internal logic, they can scale up to multi-paragraph essays. The counterargument paragraph teaches them that strong arguments acknowledge and respond to challenge.

The Most Common Problems

Unsupported claims: "I think Shakespeare was depicting loneliness in this play." Why? Students who make claims without evidence have learned that assertions are acceptable. They need consistent feedback that claims require support, not just that the claim is insufficiently argued.

Quotation burial: Students who drop quotations without explanation ("As Shakespeare wrote, 'We know what we are, but know not what we may be.' This shows Ophelia's confusion.") have not connected the evidence to the claim. The quotation sits in the paragraph like an island; the writer never explains what it demonstrates.

Thin reasoning: "This shows that..." followed by a restatement of the claim, not an explanation of why the evidence supports it. Thin reasoning is the most common and most correctable problem in student argumentative writing.

LessonDraft can help you design argumentative writing instruction, CER practice activities, and essay scaffolding sequences for any subject and grade level.

Argumentative writing is a skill, not a talent — and skills are built through deliberate instruction that targets specific structural elements, provides practice at each level, and offers feedback that is specific enough to change what students do next. Students who receive this instruction become writers who can argue; students who only receive assignments become students who can produce essay-shaped text.