Math Investigations

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Chapter 6

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 solid shapes, put the children in groups of four to six. Have each group build something with their solid shapes. When all the groups have finished, take a tour of the constructions. Have the children identify all of the shapes they see in each construction. A good time to do this activity is after Lesson 5 on combining solid shapes.

Part 2: Be an Investigator

A good time to do this investigation is after Lesson 2 on identifying solid shapes.


  • a group of solid shapes including a cube, a rectangular prism, a sphere, a cylinder, a pyramid, and a cone for each group of students
  • blindfold for each group of students (optional)

Introducing the Investigation

Introduce the investigation by showing children a group of the solid shapes. Ask a volunteer to come to the front of the class and help you demonstrate the activity. Have the volunteer close his or her eyes or wear a blindfold. Choose one of the shapes and give it to the volunteer. Have the volunteer feel the shape and say what shape it is.

Put students in groups of two to work on the investigation.

Doing the Investigation

Give each group of two children a set of solid shapes. Have them do the activity as you demonstrated it. Have them alternate turns being blindfolded or closing their eyes.

Houghton Mifflin Math Grade K