The purpose of this activity is for students to make a model of the classroom, using solid shapes. To do this, students need to:

• Choose important objects to represent.
• Decide which shapes to use to represent the objects.
• Place the shapes appropriately to represent where things are in the classroom.

When students model a situation, using a representation such as a building made of blocks, they model with mathematics (MP4). The purpose of the Activity Synthesis is to share some of the objects students chose to represent and how they represented them.

• “If you had to tell someone who has never been here before about our classroom, what would you tell them?” 
• Choose one object and ask, “How could you show _____ with the solid shapes?”

• Invite selected students to share their classroom models.
• “Which objects in the classroom did ___ show?”
• “What shape did ____ use to show a desk?”

The purpose of this activity is for students to revise their classroom models. Students go on a Gallery Walk to see the models of their classmates. Describing their model to their peers and seeing other models helps students develop ideas for how to add to or change their model.

• Invite selected students to share the changes that they made to their models and why they made them.