Math Investigations

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Chapter 5

Part 1: Home and School Investigation

Send the Letter to Family (PDF file) home with each child. Once all of the children have brought in their flower pictures, put the children in pairs. Ask them to write a number sentence that tells how many flowers they have in all. You might want to display the flower pictures and the number sentences that go with each pair in the classroom.

Part 2: Be an Investigator

A good time to do this investigation is after Lesson 5 on writing a number sentence.


Introducing the Investigation

Introduce the investigation by telling children that they are going to write a story about ladybugs flying onto a flower. Show them the Investigator Worksheet and say,

You will decide how many ladybugs are on the flower to start with. It needs to be fewer than six ladybugs. Draw a picture of those ladybugs on the flower. Then decide how many ladybugs will be flying onto the flower. Again there needs to be fewer than six ladybugs. Draw a picture of those ladybugs flying. Finally, write a number sentence below that tells how many ladybugs there are in all.

Put the children in pairs to work on the investigation.

Doing the Investigation

You may want to use the following questions to help children get started.

  • How many ladybugs are on the flower?
  • How many ladybugs are flying?
  • How many ladybugs are there in all?
  • How can you show that with a number sentence?

Have the children share their ladybug and flower stories.

Extending the Investigation

Have children tell more stories, drawing the pictures and writing the number sentences to go with the stories. They may choose to draw insects other than ladybugs.

Houghton Mifflin Math Grade 1