A precise claim is one sentence that says exactly what you are arguing in this paragraph, so that every later sentence has a job. You need this skill in any argument, discursive or persuasive writing task, and it also helps when you summarise someone else’s argument.
This lesson opens the argument structure module. The next step, linking evidence to explanation, only works once the claim is sound.
Why does the first sentence matter so much?
The first sentence of an argument paragraph sets the contract with the reader. Everything after it should prove, explain or limit that sentence. If the sentence is a topic (“Phones in school”), there is nothing to prove.
A precise claim has three parts: a subject, a position and a reason or limit. You do not always need all three in one sentence, but you need at least a position and something that narrows it.
How to build the claim, step by step
- Name the topic in a few words, for example phones in lessons.
- Choose a position. Ask “what do I think should happen, or what is true?”
- Narrow it. Add a place, a group, a time or a condition so the claim is small enough to defend.
- Add the reason if it fits neatly (“because…”).
- Test it. Could a reasonable person disagree? If nobody could, it is a fact, not a claim.
Worked example
Topic: mobile phones at school.
Step 1, topic: phones in lessons.
Step 2, position: phones cause problems in lessons.
Step 3, narrow: not everywhere, only during lessons, and only for tasks needing concentration.
Step 4, reason: a notification breaks sustained attention.
Step 5, test: someone could argue that phones help research, so it can be debated.
Precise claim: Phones should be kept out of lessons, because one notification can break the sustained attention that a difficult task needs.
Now the paragraph built around it (the classroom scene is invented for illustration):
Phones should be kept out of lessons, because one notification can break the sustained attention that a difficult task needs. Imagine a Year 10 student halfway through a long algebra problem whose phone buzzes on the desk. Even if she ignores the message, she has to find her place again and recall the step she was about to write. The interruption costs more than the few seconds it lasts, because the half-built idea in her head has gone. A school that wants students to think deeply for a full lesson should therefore protect that attention by removing the device.
Notice that every sentence serves the claim. The example is not about phones in general; it is about interrupted attention.
The mistake to watch for
Weak opening: Phones are a big problem in schools today.
This sentence names a topic and adds a mood. It does not say where, what kind of problem, or why. The student then writes about phones and cheating, phones and bullying, and phones and sleep in one paragraph.
The correction is to ask “which problem, in which place, and why?” and keep only one answer. Everything else can wait for another paragraph.
Check yourself
1. Which is the more precise claim, and why? (a) Homework is bad. (b) Homework beyond forty minutes a night in Year 10 cuts sleep without adding learning.
Show answer
(b). It names a group (Year 10), a limit (beyond forty minutes) and a reason (cuts sleep without adding learning). Someone can disagree with it, and one paragraph can defend it.
2. Rewrite “Social media has effects on teenagers” as a precise claim.
Show answer
Many answers work. One example: Scrolling social media late at night leaves teenagers too tired to concentrate the next morning. It names a behaviour, a time, a group and a consequence.
3. “School uniforms save families money and also reduce bullying.” What is wrong with this as a paragraph opening?
Show answer
It makes two claims. The paragraph would have to prove both, so the evidence would be thin. Choose one for this paragraph and give the other its own.
Where this leads next
With a sound claim in place, learn how to link evidence and explanation, then see how claims are arranged in order for a coherent progression. The writing revision compare view lets you put an early draft beside a sharper one.
If your claims are still too wide once you are writing under time pressure, our teachers can rework them with you in online one-to-one English First Language tuition.