Strong Opinions, Smart Support: Class 3 Supporting Details in Opinion Writing 

This Grade 3 worksheet on supporting details and opinion writing helps learners understand how good opinions are explained using clear reasons and strong supporting details. Through structured exercises such as identifying supporting sentences, writing multiple supporting details, giving opinions with reasons, paragraph writing, and evaluating strong versus weak details, students learn how to explain their thinking clearly. The worksheet is ideal for CBSE English learners building early persuasive writing and reasoning skills. 

Why Supporting Details Matter in Opinion Writing? 

1. Supporting details help explain why an opinion is true or important. 
2. They make writing clearer, stronger, and more convincing. 
3. Learning strong vs. weak details improves critical thinking. 
4. These skills prepare students for longer opinion paragraphs in higher grades. 

What’s Inside This Worksheet? 

🧠 Exercise 1 – Identify the Supporting Detail 
Students read a main idea and circle the one sentence that best supports it. 

📝 Exercise 2 – Write Two Supporting Details 
Learners write two clear supporting sentences for each given main idea. 

✍️ Exercise 3 – Opinion with Three Supporting Reasons 
Students share their opinion on a topic and support it with three reasons. 

📘 Exercise 4 – Write an Opinion Paragraph 
Learners write a 5–6 sentence paragraph expressing an opinion on a familiar topic. 

🔍 Exercise 5 – Strong or Weak Supporting Detail 
Students decide whether a sentence is a strong or weak supporting detail for a main idea. 

✅ Answer Key (For Parents & Educators) 

Exercise 1 – Circle the Sentence that Supports the Main Idea 
1. Apples are a healthy snack. – c) Apples have vitamins that keep your body strong. 
2. Reading is fun. – a) Books can take you to magical worlds. 
3. School helps us learn new things. – b) Teachers teach subjects like math, science, and English. 
4. Exercise keeps our body healthy. – b) Running and playing help make our muscles strong. 
5. Cats make good pets. – c) Cats are gentle and like to stay close to their owners. 

Exercise 2 – Write Two Supporting Details 
(Sample answers) 

1. Playing outside is good for children. 
• It helps children stay active and healthy. 
• Children feel happy and relaxed when they play outside. 

2. Water is important for life. 
• Plants, animals, and people need water to live. 
• Drinking water keeps our body healthy. 

3. We should keep our classroom clean. 
• A clean classroom keeps us safe from germs. 
• It makes our classroom look neat and pleasant. 

4. Eating fruits keeps us healthy. 
• Fruits give us vitamins and energy. 
• They help us grow strong and stay fit. 

5. Helping others is a good habit. 
• Helping makes people feel happy and cared for. 
• It teaches us kindness and teamwork. 

Exercise 3 – Write Your Opinion and Three Supporting Reasons 
(Sample answers) 

1. Topic: Are school uniforms important? 
Opinion: Yes, school uniforms are important. 
Reason 1: Uniforms make all students look equal. 
Reason 2: They help students focus on learning instead of clothes. 
Reason 3: Uniforms make it easy to identify students in school. 

2. Topic: Should students have a longer recess? 
Opinion: Yes, students should have a longer recess. 
Reason 1: Recess helps students relax and reduce stress. 
Reason 2: Playing outside keeps students healthy. 
Reason 3: Students concentrate better after a good break. 

3. Topic: Is reading books better than watching TV? 
Opinion: Yes, reading books is better than watching TV. 
Reason 1: Reading improves imagination and thinking skills. 
Reason 2: Books help us learn new words. 
Reason 3: Reading is good for our eyes and focus. 

Exercise 4 – Opinion Paragraph (5–6 sentences) 
(Sample answer – Topic: Why reading is important) 

Reading is very important for everyone. It helps us learn new words and improve our language skills. When we read, our imagination grows, and we learn new ideas. Reading also helps us focus better in class. It makes us smarter and more confident. That is why reading is an important habit. 

Exercise 5 – Strong (S) or Weak (W) Supporting Detail 
1. Plants need sunlight to grow. 
a) Sunlight helps plants make their own food. – S
b) Some plants have colourful flowers. – W

2. Riding a bicycle is good exercise. 
a) Many bicycles are blue or black. – W
b) It helps make your legs stronger. – S 

3. Breakfast is the most important meal of the day. 
a) Many people eat toast or cereal. – W 
b) It gives you energy to start the morning. – S

4. Dogs are helpful animals. 
a) Dogs can guide people who cannot see. – S
b) Dogs have long tails. – W

5. Drinking water keeps the body healthy. 
a) Water fills bottles and jars. – W 
b) Water helps your body stay cool. – S

Help your child build strong opinion writing skills by learning how to support ideas clearly and confidently. 

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