Main Idea and Key Details

Grade 3 Reading Worksheet

Read each passage. Circle the sentence that tells the main idea.

1. Read this first

   Our Class Garden

   Our class garden grew a lot this spring. We planted beans, carrots and sunflowers. Each week we watered the plants and pulled the weeds. In June we picked the first beans.

2. 1.
   • Gardens are green.
   • We planted only tomatoes.
   • Each week we watered the plants and pulled the weeds.
   • Our class garden grew well this spring.

3. The Rainforest

   Rainforests are warm and wet all year. More than half of the world's kinds of plants and animals live there. Tall trees make a green roof high above the ground. Many animals live in the trees.

4. 2.
   • Many animals live in the trees.
   • Rainforests are warm, wet places full of life.
   • Forests are important.
   • Rainforests are cold and dry.

5. The Changing Moon

   The moon changes shape in the sky. Some nights it is a thin curve. A week later it looks like half a circle. When the whole face is lit, it is called a full moon.

6. 3.
   • The moon is always a full circle.
   • Space has many things to see.
   • Some nights the moon is a thin curve.
   • The moon looks different on different nights.

7. The Library

   Libraries are places to find books for free. You can borrow a book with a library card. Many libraries have story time for young children. Some also have computers you can use.

8. 4.
   • Reading is important.
   • A library lets people borrow books and use other things for free.
   • You must pay for each book you borrow.
   • Many libraries have story time for young children.