Persuasion and Propaganda · Term 2

Constructing Logical Arguments

Drafting persuasive texts that use evidence and logical sequencing to support a clear contention.

About This Topic

Constructing logical arguments is a foundational skill for persuasive writing and critical thinking. In Year 6, students learn to move beyond simple opinions to building a case supported by credible evidence, logical sequencing, and strong modality. This topic aligns with ACARA's focus on creating well-structured persuasive texts that use a variety of language features to influence an audience. Students learn how to introduce a clear contention, support it with 'PEEL' (Point, Evidence, Explanation, Link) paragraphs, and address counter-arguments to strengthen their own position.

In the Australian context, students might tackle local issues like school uniform policies, environmental sustainability, or community projects. This topic is highly suited to active learning because logic is best tested through social interaction. Students grasp this concept faster through structured discussion and peer explanation, where they must defend their logic against 'friendly' opposition.

Learning Objectives

• Analyze the logical structure of persuasive texts to identify the contention, supporting evidence, and explanations.
• Evaluate the credibility of evidence presented in persuasive texts, considering its source and relevance.
• Explain how addressing counter-arguments strengthens a writer's position and persuades an audience.
• Create a persuasive paragraph that uses the PEEL structure (Point, Evidence, Explanation, Link) to support a clear contention.
• Compare the impact of different modality choices on the strength of a recommendation in a given text.

Before You Start

Identifying Main Ideas and Supporting Details

Why: Students need to be able to distinguish between a central point and the information that backs it up before constructing arguments.

Expressing Opinions and Reasons

Why: This builds on the foundational skill of stating a viewpoint and providing basic justifications, preparing them for more complex evidence and explanation.

Key Vocabulary

Contention	The main argument or point of view that a writer is trying to persuade their audience to accept.
Evidence	Facts, statistics, examples, or expert opinions used to support a contention. Credible evidence is trustworthy and relevant.
Explanation	The part of an argument that clarifies how the evidence supports the point or contention.
Counter-argument	An argument that opposes the writer's main contention, which is then addressed and refuted to strengthen the original position.
Modality	The degree of certainty or possibility expressed in language, often through modal verbs (e.g., 'must', 'should', 'might') or adverbs (e.g., 'definitely', 'possibly').

Active Learning Ideas

Formal Debate: The Evidence Auction

Groups are given a 'budget' to 'buy' pieces of evidence for a specific topic. Some evidence is weak (anecdotes), while some is strong (statistics from experts). Groups must then build an argument using only the evidence they 'purchased'.

⏱ 45 min·Small Groups

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Inquiry Circle: The Logic Chain

Students are given a contention and several 'jumbled' sentences. They must work together to sequence the sentences in the most logical order, identifying which sentences are points, evidence, or explanations.

⏱ 30 min·Small Groups

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Peer Teaching: Counter-Argument Attack

Pairs write a strong argument for a topic. They then swap with another pair who must find a 'hole' in the logic and write a counter-argument. The original pair then has to 'fix' their argument to address the weakness.

⏱ 40 min·Pairs

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Real-World Connections

Lawyers construct logical arguments in court, presenting evidence and explanations to persuade a judge or jury, while also anticipating and refuting the opposing counsel's points.

Journalists writing opinion pieces or editorials must present a clear contention, support it with credible facts and sources, and often acknowledge alternative viewpoints to build a strong case for their readers.

Advertisers use persuasive language and carefully selected evidence, sometimes with strong modality, to convince consumers to purchase products or services, while carefully avoiding misleading claims.

Watch Out for These Misconceptions

Common Misconception

A good argument is just a long list of reasons.

What to Teach Instead

Students often prioritize quantity over quality. Use a 'think-pair-share' to evaluate three weak reasons versus one deeply explained logical point to show which is more convincing to a reader.

Common Misconception

Including a counter-argument makes your own side look weak.

What to Teach Instead

Students often fear the 'other side'. Through structured debate, show them that acknowledging and then disproving a counter-argument actually makes them look more informed and their own case more robust.

Assessment Ideas

Quick Check

Provide students with a short persuasive text. Ask them to highlight the contention in one color, all evidence in another, and explanations in a third. Then, ask them to write one sentence identifying the strongest piece of evidence and why.

Discussion Prompt

Pose a class debate topic, such as 'Should schools ban mobile phones?' After students have time to prepare, ask them to share one counter-argument they considered and explain how they would refute it to strengthen their own side.

Peer Assessment

Students draft a persuasive paragraph on a given topic. They then swap with a partner and use a checklist to assess: Is the contention clear? Is there at least one piece of evidence? Is the evidence explained? Does the paragraph link back to the contention? Partners provide one specific suggestion for improvement.

Frequently Asked Questions

How can active learning help students understand logical arguments?

Active learning, like debates and evidence auctions, makes the 'weight' of an argument visible. When students have to 'buy' evidence or defend a point against a peer, they quickly realize which facts are strong and which are just opinions. This social testing helps them internalize the structure of logic much better than just filling out a worksheet.

What is 'modality' and why does it matter?

Modality refers to the strength of a word (e.g., 'might' vs. 'must'). High modality words make an argument sound certain and authoritative, while low modality can make it sound like a suggestion. Choosing the right level of modality is key to being persuasive.

How do I help students find 'credible' evidence?

Teach them to look for the source. Is it from a university, a government body, or a random blog? In Year 6, we focus on finding 'expert' opinions and verifiable facts rather than just personal stories.

What is the PEEL structure?

PEEL stands for Point (the main idea), Evidence (the facts), Explanation (how the facts prove the point), and Link (connecting back to the main contention). It is a scaffold that helps students ensure every paragraph is logical and focused.