D. Composition: Expressing Ideas and Creating Texts · Writing with Purpose, Voice and Evidence

Persuasive Writing: Building a Convincing Argument

D2.1 D1.1 D1.4 A2.5About 45 minutes

Learning goals

I can write a persuasive text with a clear opinion, several reasons and evidence for each reason.
I can answer what someone on the other side might say.
I can end with a call to action and use persuasive language fairly.

Words to know

opinion
What you think or believe. Others might disagree.

reason
Why you believe your opinion.

evidence
Facts, examples, numbers, expert words or experiences that prove a reason.

counter-argument
What someone who disagrees might say.

rebuttal
Your polite answer to the counter-argument.

call to action
The ending that tells the audience exactly what you want them to do.

Remember from Grade 3

In Grade 3 you used O-R-E-O: Opinion, Reasons, Examples and facts, Opinion again. You learned the difference between fact and opinion. In Grade 4 you will write several paragraphs, give evidence for each reason, answer the other side, and finish with a call to action.

Why it matters

Persuasive writing helps you make real change: getting a crosswalk near your school, starting a club, or asking for a fairer rule. Leaders, lawyers, scientists and advertisers all persuade. A strong argument is clear, backed by evidence and respectful of people who disagree.

The structure of a persuasive text: introduction with a hook and opinion, three reasons with evidence, the other side and your answer, and a conclusion with a call to action.

A model persuasive letter

Dear Principal Wong,

Have you ever stood alone at recess, wishing someone would ask you to play? I believe our school should put a buddy bench on the playground.

First, a buddy bench helps students who feel lonely. When students sit on the bench, others know they want someone to play with. In our class survey, 18 of 26 students said they had felt left out at recess at least once.

Also, a buddy bench teaches kindness. Older students can be bench helpers. Our Grade 6 reading buddies already show how much younger students look up to them.

Most importantly, everyone can use it. The bench could sit beside the paved path, so students who use wheelchairs or walkers can reach it easily too.

Some people might say a bench costs too much. However, our class is ready to hold a bake sale to pay for it, and the Parent Council has offered to help.

A buddy bench would make our playground a place where everyone belongs. Please let our class present this idea at the next assembly.

Sincerely,

Riya, Grade 4

Riya's evidence as a picture: 18 of 26 students said they had felt left out at recess at least once. Real numbers make a reason more convincing.

Worked example

Let's find the parts of the argument

Label each part of Riya's letter.

Hook: Have you ever stood alone at recess...? (a question that makes the reader feel it).
Opinion: I believe our school should put a buddy bench on the playground.
Reason 1 + evidence: helps lonely students; the class survey (18 of 26).
Reason 2 + evidence: teaches kindness; Grade 6 reading buddies as an example.
Reason 3 + evidence: everyone can use it; the bench beside the paved path.
Counter-argument + rebuttal: costs too much → bake sale and Parent Council help.
Conclusion + call to action: Please let our class present this idea at the next assembly.

The letter has every part. Riya saved her most important reason for last and used transition words: First, Also, Most importantly, However.

Worked example

Let's answer the other side

Opinion: Our class should go on a field trip to the science centre. Someone might say: It takes too much time away from class.

Say the counter-argument fairly: Some people think a field trip takes too much time away from learning.
Answer it with a reason: However, at the science centre we would learn by doing real experiments.
Connect it to evidence: We are studying light and sound right now, and the centre has hands-on exhibits about them.

Some people think a field trip takes too much time away from learning. However, we would learn by doing real experiments, and the science centre's hands-on exhibits about light and sound match exactly what we are studying.

Persuasive language, used fairly

Strong, confident words: I believe, clearly, must, should.
Transition words: First, In addition, Also, Most importantly, However, In conclusion.
Questions that make readers think: Wouldn't it be great if...?
Feelings: help the reader imagine how others feel.

Persuade honestly. Use only true facts, don't exaggerate, and never insult people who disagree. A respectful argument convinces more people.

Match your argument to your audience

Think about what your audience cares about. A principal cares about safety, learning and cost. Parents care about health and happiness. Classmates care about fun and fairness. Choose reasons that matter to them.

Just for fun

A cat's persuasive letter: Reason 1: I am cute. Reason 2: I am hungry. Reason 3: See Reason 1.

Nice try, cat. A strong argument needs evidence for each reason!

Hands-on activity

Kitchen-table debate

You need: paper, a pencil, a timer, and one or more family members.

Choose a fun family question, like Should we have a family games night every week? or Should we get a bird feeder?
Pick a side. Write your opinion, 3 reasons and one piece of evidence for each.
Write what the other side might say, and your answer.
Set the timer for 2 minutes and present your argument. Then let a family member argue the other side.
Vote. Talk about which reason was the most convincing and why.
Turn your argument into a letter with a call to action, and give it to the person who can make the decision.

Your turn

What is a call to action?

Fact or opinion? Our library has 3 computers.

Give evidence for this reason: Kids should have a longer recess because exercise helps them focus.

Write a counter-argument for Our school should have a pet rabbit.

Write a rebuttal to the counter-argument you just wrote.

Name three transition words for persuasive writing.

Why should you be respectful of people who disagree?

More practice: warm-up

What does evidence do?

Where does the opinion usually go?

Fact or opinion? Winter is the best season.

What is a hook?

How many reasons does the model letter have?

More practice: on your own

Write an opinion sentence about whether students should help plan school events.

Which reason is stronger for a principal: Pizza Day is yummy or Pizza Day raises money for new library books? Why?

Write a call to action for a letter asking your town to add more garbage bins at the park.

Turn this weak sentence into a fair one: Anyone who doesn't like recycling is lazy.

Why might a writer put the strongest reason last?

Challenge

Write an introduction (hook + opinion) for a speech to your class about why everyone should learn a few words in another language.

Write one full body paragraph: a reason with two pieces of evidence, for Our town should keep the outdoor rink open longer.

An ad says: Everyone loves Super Snacks! Buy them now! Is this good evidence? Explain.

Check your understanding

Quiz

What goes in the conclusion of a persuasive letter?

Which is evidence?

What is a counter-argument?

Which sentence is a call to action?

Which reason would matter most to a principal deciding on a school garden?

Which is a respectful way to mention the other side?

For parents and teachers

Big idea (D2.1): Grade 4 writers draft persuasive texts that state a clear opinion, give reasons with evidence, address another point of view, and end with a call to action. Choosing reasons for a specific audience connects to D1.1 and A2.5 (how form, audience and message work together); ordering reasons by importance connects to D1.4.

How to help at home:

Let your child persuade you about small family decisions in writing. Respond seriously.
Point out persuasive techniques in ads and ask, Is that a fact or an opinion? What are they leaving out?
Model respectful disagreement in family discussions.

Common difficulties:

Reasons with no evidence. Ask, How do you know? Can you give an example?
Ignoring the other side. Ask, What would someone who disagrees say?
Exaggeration ("everyone," "never"). Encourage honest, specific facts.

The survey numbers in the model letter belong to the pretend writer's class, as an example of how students can gather their own evidence.