When I was in the classroom, even my senior students had a rough time starting argumentative paragraphs and putting together a cohesive argument. They’d start with vague opinions or jump right into supporting details. That is, until I embraced teaching the CER (claim, evidence, and reasoning) framework. In this post, I’ll guide you through how to teach claim.

When it comes to teaching claim most effectively, I always return to the same core belief: students need a scaffolded path from claiming to arguing. It doesn’t matter if you teach middle school, high school, or a content area. 

In this post, I’ll cover:

• an overview of CER (claim, evidence, reasoning)
• claim-specific practice (such as claim task cards)
• how to move students beyond the claim into full theses and argumentative essays

I’ll also point out pitfalls and how to guide students in raising their writing skill and critical thinking. I’ll use examples for science teachers and social studies teachers, but I’ll mostly defer to English language arts since that’s my area of expertise.

What Is “Claim”? And Why Teach It?

When we say “teach claim,” we mean giving students a strong foundation for making an argumentative claim—i.e. a debatable statement that can be supported with good evidence and reasoning.

In the Common Core (and many writing standards), the claim is the first criterion of an argumentative text: you can’t build an argument without it.

The challenge is that many students (especially middle school students or early high school) treat claims as opinions rather than arguable statements. They might say, “I think minimum wage should increase,” but they haven’t phrased it strongly or given direction to their argument.

A strong argumentative claim might say, “The minimum wage should rise to $15/hour because it reduces poverty, increases worker productivity, and stabilizes the economy.” This claim is specific, arguable, and sets up the rest of the essay.

So when you teach claim, your goal is to help students move from vague opinions to well-targeted claims that guide their argumentative essay.

The CER Framework: Claim, Evidence, Reasoning

A practical starting point for teaching claim is embedding it in the CER framework. Many teachers use CER (claim, evidence, reasoning) as a scaffold to help students structure CER responses, whether in science labs, social studies, or literary analysis. 

If CER is new to you, I really recommend starting with this blog post, which gives an overview of claim, evidence, and reasoning.

Otherwise, here’s a refresh:

• Claim: a statement or argument that answers a question or prompt.
• Evidence: facts, data, quotations, observations, or textual evidence that support the claim.
• Reasoning: the explanation of how and why the evidence supports the claim, often using domain-specific principles (scientific principles in science; historical thinking in social studies; rhetorical or literary ideas in English).

This trio forces students to do more than “say something” — they must back it up and then justify their logic.

If you haven’t covered the CER framework in your class yet, you can grab these done-for-you minilessons to make it super simple!

Why use CER?

• It gives students a strong foundation in writing skills (they always know what pieces they need).
• It scaffolds short and longer writing for struggling students
• It emphasizes critical thinking: students must make connections (reasoning), not just drop in evidence.
• It works across grade levels and across subjects. Even math teachers have adapted CER for complex problem solutions. (Edutopia)
• It aligns with the first step of argument construction: claim.
• It helps reveal claim status: whether a student’s claim is weak, vague, or strong.

That said, CER is not a final product; it’s a stepping stone. Once students master it, you’ll want them to use claims inside longer argumentative texts or essays.

Claim-Specific Practice: Task Cards, Scaffolds, & Activities

When students are first learning the parts of CER, it’s best to let them practice each component directly. Here are several ideas (and how to adapt them for various grade levels and content areas) that focus specifically on practicing claims:

1. Claim Task Cards

Create a set of task cards (or digital slides) that ask students to do one of the following:

• Identify the claim in a sentence or paragraph
• Evaluate a claim (strong vs weak, vague vs precise)
• Revise or improve a weak claim into a stronger one
• Write a claim from a prompt or a controversial topic

For example, a card might say:

Prompt: “Should social media platforms ban political ads?”Task: Write a strong claim in one sentence.

Or:

Here is a student response: “I think social media is bad for kids.”Task: Is that a strong claim? If not, revise.

You can grab a set of done-for-you task cards right here. These task cards provide students with claim-specific practice before they begin assembling complete CER responses.

2. Claim Comparison / Claim Tester

After students generate claims, use a claim tester checklist (or rubric) to evaluate:

• Is the claim arguable (i.e. someone could disagree)?
• Is it specific rather than vague?
• Does it preview the key arguments / subclaims?
• Does it avoid embedding evidence or reasoning (that belongs later)?
• Is the point of view clear?

You might give students sample claims and ask them to test them via that rubric (the claim status becomes clear: strong, moderate, weak).

3. Color-Highlighting Claims in Texts

Give students excerpts from argumentative text (editorials, essays, scientific articles) and ask them to highlight or label the claim, evidence, and reasoning in different colors. This helps them see how real writers craft claims in context. (Sadler Science)

You can download my CER Review Worksheet here, which asks students to highlight claims, evidence, and reasoning in various passages. 

4. Turn and Talk / Philosophical Chairs & Mid-claim Pause

You can embed a mini debate or turn and talk around a controversial topic (e.g. minimum wage, social media regulation).

After students take stances and share student responses, pause and ask: “What is your claim exactly? What words will you use to state it stronger?” This builds metacognitive awareness of how to teach claim in real time. (Some teachers even pause halfway through discussions for this reflection). (Teacher Off Duty)

From Claim to Thesis: Going Beyond the Claim

Once students have mastered claim (and the whole CER framework), you can use their mastery to teach and practice thesis writing. 

A claim is essential, but in a true argumentative essay, students need a thesis — often a more developed claim that signals structure and complexity. Students’ knowledge and understanding of claims can help them create better, more thorough theses.

Here’s how to help them elevate:

1. Teach the difference

• A claim is often narrower — in a CER paragraph, it’s the main idea.
• A thesis or strong argumentative claim in a full essay can act as an umbrella: it must forecast key arguments or subclaims and respond to the complexity of the prompt (including counterarguments).

For example:

• Claim (for a paragraph): “Raising the minimum wage to $15 helps reduce poverty.”
• Thesis (for a full essay): “Raising the federal minimum wage to $15 per hour is necessary because it alleviates poverty, boosts local economies through increased consumer spending, and reduces turnover costs for businesses, though opponents argue it will increase unemployment, those risks can be mitigated via phased implementation.”

The thesis includes both pro arguments and implied acknowledgment of counterpoints.

2. Use claim scaffolds for essays

Encourage students to build a thesis scaffold like:

1. Issue / topic statement
2. Strong claim (their position)
3. Three key arguments (briefly stated)
4. A nod to complexity or counterargument

This kind of scaffold helps students transition from CER-style thinking into full argumentative reading and writing.

3. Require “beyond claim” rationale in body paragraphs

Once students write body paragraphs, challenge them to not only make a claim + evidence + reasoning in each paragraph but to link back to the thesis. Ask:

• How does this subclaim feed into the overall thesis?
• Does the reasoning connect to the major themes?
• Are they anticipating objections?

4. Revision prompts around claim/thesis

When peer- or self-editing, include these prompts:

• Is the thesis still too weak or vague?
• Does the essay drift away from the original thesis (i.e. “claim drift”)?
• Do any body paragraphs have claims that don’t clearly support the thesis?
• Could the thesis be improved via stronger vocabulary words or more precise language?

By looping back to teach claim not just at the start, but through the writing process, you help students keep their arguments coherent.

Sample Lesson Flow: Teach Claim + CER + Thesis

Here’s a suggested sequence you can try (e.g. in an English or social studies class). Adapt as needed by grade level (middle school, high school) or discipline (social studies, science, ELA).

1. Hook / prompt: Present a provocative or controversial topic (e.g. “Should the minimum wage be raised to $15?”).
2. Think / write a claim individually: Ask students to write a one-sentence claim in response.
3. Share & peer-test: Students swap claims and use a claim tester checklist to give feedback.
4. Mini lecture: CER: Introduce or review the CER framework (claim, evidence, reasoning) and its purpose.
5. Model a CER paragraph: Project a model with a strong claim, relevant evidence, and reasoning.
6. Guided practice: In pairs, students take a short prompt and craft a CER paragraph.
7. Claim task cards: Stations or small groups rotate through cards that ask them to evaluate or improve claims.
8. Thesis extension: Ask students to expand their initial claims into a 2- or 3-sentence thesis that forecasts key arguments.
9. Homework / formative: Ask students to choose a controversial topic (social media, minimum wage, climate policy) and write a claim, annotated evidence, and a tentative thesis.

Throughout the unit, revisit and reinforce claim strategies whenever students write argumentative texts.

Addressing Discipline Differences: Science, Social Studies, ELA

One great strength of the teach claim and CER approach is its flexibility across grade levels and disciplines.

In science/engineering practices

Science teachers often use CER in class labs or inquiry contexts. Students make a scientific claim (answer to the research question), support it with data or observation as evidence, and provide reasoning by appealing to scientific principles or mechanisms. (gizmos.explorelearning.com)

To push students beyond basic CER in science:

• Ask them to anticipate alternative explanations (i.e. counterclaims).
• Encourage them to reference engineering practices or modeling in their reasoning.
• Extend isolated CER paragraphs into a lab report or mini argument with multiple claims and cross-claim interactions.

In social studies/history

In social studies, a claim might respond to an inquiry question: e.g. “To what extent did the New Deal transform the role of the federal government?” Students would then use primary sources, historical data, or secondary scholarship as evidence and reasoning based on causation, continuity, and change.

Use CER with primary source analysis (claim, evidence, reasoning on a document) as a scaffold, then push students into more synthetic essays. (The Library of Congress)

Make sure students engage with point of view, relevance of evidence, and counterarguments (e.g. conflicting historical interpretations).

In English / ELA / literary argument

In English language arts, the claim becomes a thesis about a text or texts (for example: “The novel’s use of third-person limited narration underscores the protagonist’s isolation”). Evidence comes from textual evidence, quotations, or close reading, and reasoning uses literary devices, themes, character analysis, or rhetorical strategies.

Start with CER responses to micro-prompts (short paragraphs analyzing a snippet), then have students build multi-paragraph argumentative essays that integrate stronger claims/theses, sophisticated reasoning, and counterpoints.

Common Teacher Pitfalls (and How to Avoid Them)

When teachers begin to teach claim, certain pitfalls often emerge. Knowing them can save time and help your students:

1. Overly formulaic/robotic CER: If students only view CER as a rigid plug-and-play, their writing suffers. To counter this, gradually release scaffolds, vary prompts, and require integration of claim + evidence + reasoning with organic flow.
2. Weak or vague claims: Students may write safe statements (“Social media is bad”) that aren’t arguable or precise. Push them to add nuance, specificity, or complexity.
3. Evidence without relevance / “data dump: ”Some students include lots of evidence but don’t tie it to the claim. Remind them: evidence must be relevant evidence, not just any fact. Use prompts: “Does this evidence directly support your claim? Why?”
4. Reasoning that restates evidence: In weak CERs, reasoning is just a paraphrase of evidence. Encourage students to explain why the evidence matters—often by invoking domain principles or broader implications.
5. Claim drift: Over the course of an essay, students sometimes drift from their original claim. Use frequent check-ins: “Does this paragraph still serve the thesis?” or “Is your claim still guiding this point?”
6. Ignoring counterclaims/complexity: A truly strong claim must grapple with complexity. Encourage students to include or at least anticipate alternative points of view or objections.
7. Lack of vocabulary precision: To elevate claims and reasoning, students should use strong vocabulary words (e.g. exacerbate, mitigate, paradox, leverage) appropriately. Encourage academic word choice in claim and reasoning.

Sample Mini-CER + Thesis Example (on Minimum Wage)

Here’s a short example to illustrate how you might scaffold students upward.

Prompt: Should the federal minimum wage be increased to $15?

Initial claim (student attempt): Raising the minimum wage to $15 benefits workers.

Revised stronger claim / thesis: The federal government should increase the minimum wage to $15 because it reduces poverty, increases consumer spending, and lowers employee turnover—despite concerns about unemployment, these effects can be managed through phased implementation.

CER paragraph (on one subclaim):

• Claim: Increasing the minimum wage boosts consumer spending, which stimulates local economies.
• Evidence: According to a 2022 Brookings study, workers in low-income households tend to spend 90 percent of additional earnings, primarily on necessities in their local community.
• Reasoning: Because low-income households have high marginal propensity to consume, every dollar increase circulates rapidly in the local economy, increasing demand for goods and services, which in turn supports small businesses and low-wage employers. That chain from wage increase to economic growth ties directly to the overarching thesis: the wage hike doesn’t just help individuals but helps communities.

If I were grading that in a high school class, I would then look: Does the essay stay consistent with that thesis? Do other paragraphs link back? Are counterarguments addressed (e.g. fears about job loss)?

Tips for Implementing at Different Grade Levels & Content Areas

• Middle school students often need more scaffolding. Use CER strictly in single-paragraph responses before asking for multi-paragraph essays.
• High school students can handle thesis extension earlier—ask them to move from CER paragraphs into full argumentative essays.
• Use vocabulary words (argument, claim, evidence, sufficient, relevant, controversial topic, counterargument) as part of instruction so students internalize discourse.
• Use PowerPoint presentation or anchor charts to display model claims, evidence, reasoning, and sample theses.
• In science/engineering, tie claim and reasoning to scientific principles (e.g. laws, mechanisms, causation).
• In social studies, push students to account for point of view, context, and complexity when forming their claims.
• Provide “claim status” feedback in writing conferences or margin comments.
• Use calendar years or chronological markers when dealing with historical or longitudinal arguments to make claims more precise (e.g. “Between 2000 and 2020…”).
• Encourage student response culture: have students post claims on a board (in person or via social media/class forum) and critique each other.
• Use a claim tester or rubric to self-assess before turning in final drafts.
• Over time, remove scaffolds so students internalize how to begin with a strong claim.

Why Emphasizing Claims Matters in the Bigger Picture

Focusing on teaching claims is more than pedagogical nitpicking—it builds critical thinking and deeper writing capacity. Once students understand how to craft a defensible claim and support it with evidence and reasoning:

• They are better able to read argumentative texts because they can spot claims, evaluate evidence, and trace reasoning.
• They can approach controversial topics (climate change, social media moderation, economic policy) with intellectual rigor rather than opinion.
• Their writing skill levels up: essays become more coherent, more persuasive, and more academically rich.
• They learn that claim → evidence → reasoning is a transferable scaffold they can use across science, ELA, social studies, or even non-school debates.
• Their ability to critique weak claims (in media, social media, news) grows stronger—they become more discerning consumers of information.

Final Thoughts & Next Steps

To teach claim well, start small (CER), scaffold deliberately, and gradually push students into more complex argumentative writing. Use claim task cards, claim tester checklists, and repeated practice across grade levels and disciplines. Always return to the question: Does this claim set up an argument worth making?

If you want to learn how to teach claim, evidence, and reasoning, check out this blog post!