Argument is not just an ELA skill. Science uses argument (claim, evidence, reasoning). History uses argument (thesis, evidence, counterargument). Math uses argument (proof, justification). Every subject area has its own argumentative conventions — and teaching students to recognize and use them is one of the most transferable skills schools can offer.

Yet argument instruction is still largely siloed. Students write persuasive essays in English class and don't connect that to constructing explanations in science or supporting claims in history. Here's how to build genuine argument literacy across disciplines.

What Makes an Argument an Argument

Students conflate "argument" with "opinion" or "fight." Clarifying the distinction is the foundation.

An opinion is a preference: "I like winter better than summer."

An argument is a claim + evidence + reasoning: "Winter is better for outdoor exercise in our region because [specific climate data] which means [connection to physical activity research]."

An argument can be wrong. An opinion can't really be wrong — it's just a preference. Arguments make claims that can be evaluated against evidence.

This distinction matters for how students read, write, and evaluate ideas across every subject.

The Common Framework: Claim-Evidence-Reasoning

CER (Claim-Evidence-Reasoning) translates across disciplines better than any other argument framework:

Claim: A specific, defensible statement — not a fact, not a question, not a value judgment. "The Salem witch trials were primarily driven by social conflict" is a claim. "Salem witch trials happened in 1692" is a fact.

Evidence: Specific information — data, quotation, observation, statistic — that supports the claim. "Evidence is not 'the book said'" — it's specific and cited.

Reasoning: The explanation of how and why the evidence supports the claim. This is the logical bridge that students most often skip.

Teaching CER as a shared language across subjects helps students transfer the skill. When the science teacher says "what's your reasoning?" and the English teacher says "what's your reasoning?" — and they mean the same thing — students build the habit.

Reading Arguments: The Rhetorical Read

Students should learn to read texts as arguments, not just as information containers. Every nonfiction text makes choices about what to include, what to exclude, and how to frame claims.

The rhetorical read asks:

What is the author claiming?
What evidence do they use?
What's the reasoning connecting evidence to claim?
What does the author leave out?
Who is the audience, and how does that shape the argument?
What assumptions is the author making that I might not share?

Teaching this as an explicit reading strategy — not just a discussion question format — builds critical reading habits that transfer to news media, academic texts, and professional contexts.

In Science: Argument as Explanation

Science argument has a specific structure: a claim about a phenomenon, evidence from data or observations, and reasoning that connects the evidence to the claim using scientific principles.

The key distinction from other disciplines: scientific arguments must be falsifiable. A good scientific claim could be proven wrong — and students should understand why that matters.

Teaching students to argue from evidence in science also means teaching them to revise claims when new evidence warrants it. This is different from literary argument, where a claim about a text's meaning is defended rather than tested. The norms of each discipline shape argument differently.

In History: Argument as Interpretation

Historical argument differs from scientific argument in that evidence is often incomplete, partial, and perspectival. Primary sources represent specific viewpoints; the historian's job is to construct the most defensible interpretation given the available evidence.

Teaching historical argument means teaching students that:

History is interpretation, not just fact
Evidence must be sourced (who wrote this? when? for what purpose?)
Multiple interpretations can be defensible; some are better supported than others
A strong historical argument addresses counterevidence directly

When students write historical thesis statements and support them with primary source evidence, they're learning to think historically — not just to recall content.

In ELA: Argument as Analysis

Literary argument — "this text means X because Y" — is perhaps the most abstract form. Evidence is quotation and textual observation; reasoning connects observed language features to interpretive claims.

The weakness of most literary argument instruction is that claims are too vague to be argued: "The theme of this book is that friendship matters." More defensible: "Steinbeck uses Lennie and George's relationship to critique the American Dream myth of individual self-sufficiency."

Teaching students to make specific, falsifiable literary claims — claims that could be challenged — produces analysis rather than plot summary.

Cross-Disciplinary Argument Across a Day

Imagine a student's Tuesday:

Period 1 (Science): "Based on your data, make a claim about which variable had the greatest effect"
Period 3 (History): "Write a thesis arguing for the most significant cause of the Civil War"
Period 5 (ELA): "Construct an argument about what the symbolism in this chapter reveals about the character"

If these teachers are using similar vocabulary — claim, evidence, reasoning — and similar expectations for what an argument looks like, students start to see the skill as one skill, not three separate requirements.

That transfer requires communication between teachers. It doesn't have to be elaborate — a shared one-page document on CER and shared vocabulary often does it.

LessonDraft can help you generate argument-focused lesson plans, CER templates, and reading discussion protocols for any subject area.

Argument literacy is one of the most durable skills students can develop in school. The ability to construct a claim, support it with evidence, and explain the reasoning — and to evaluate others' claims by the same standard — is what informed citizenship, professional communication, and honest inquiry all depend on.

Teaching Students to Argue: Reading and Writing Arguments Across Subjects