A useful detail develops the reason. “Chess pieces can be black and white” is true, but it doesn’t explain how a chess club could offer a quiet lunchtime choice.
For this Year 5 writing activity, keep the reason and ask students to add something that helps the reader picture the proposal.
Keep the reason. Develop the idea.
Imagine students are asking the student council to support a chess-club suggestion for the principal to consider. Write this request on the board: “Student council, please support a lunchtime chess club.” Then compare these versions of the reason:
Before: A lunchtime chess club could offer a quiet lunchtime choice.
After: A lunchtime chess club could offer a quiet lunchtime choice. We propose a space for pairs to play chess, with conversation kept low so games can run alongside each other.
Ask, “What can the council picture now that it couldn’t picture before?”
The added sentence explains how students propose to keep the activity quiet: paired games and low conversation. It develops the same reason instead of starting another argument.
Now swap it for “Chess pieces can be black and white.” Ask what that tells the council about the proposed quiet activity. The colour detail belongs to the topic, but it doesn’t explain this reason. Ask students to explain why the detail helps, or why it doesn’t.
Invite students to suggest a different detail and explain its job. Use the prompt, “This helps the council understand…” If the explanation is unclear, talk it through before adding more words.
Say what is proposed and what is known
The arrangement above is a suggestion, not an existing school provision. It doesn’t establish student demand or settle questions about space and supervision. Those would need checking before approval.
A supporting detail can explain how a proposal might work; evidence supports a claim with checkable information. The NSW persuasive-writing guidance distinguishes audience, reasons and evidence, and asks writers to suit their language to the audience and situation. Here, students are explaining the proposal clearly enough for the student council to discuss it.
Try it with the native-garden argument
The Year 5 Persuasive Writing Unit includes an “Audience & Arguments worksheet and answers”. Use section B of the full sample page below for the next attempt.
The printed instruction asks students to rewrite “We need a native garden because it would be good” for the principal, giving a clear reason and supporting detail.
Let students try it, then offer this teaching example:
Please consider a native garden so classes could have a place to observe plants outdoors. The proposal could include plant labels for students to use when recording what they notice.
Ask students to underline the reason and box the detail. The labels show how students could use the garden while observing plants. Compare that with adding “The garden could have a colourful entrance sign.” A sign might have another purpose, but this sentence doesn’t explain how students would observe plants.
Section A offers audience-and-argument matching if students need help finding a reason first. Section C asks them to choose the stronger opening and explain why.
Ask the detail to do a job
This practice draws on part of Year 5 English: developing ideas for an audience with supporting details, examining persuasive features and editing texts.
Take an already relevant reason from the next persuasive draft. Ask students to add one supporting detail and finish: “This helps my reader understand…” Keep the detail if they can explain its contribution. If they can’t yet, revise that sentence together.