## Reflection: Staircase of Complexity Making new shapes with shapes - Section 3: Independent Practice

It is very important to build up to 3-dimensional shapes instruction and not just start off with this lesson. The previous 2D shape lessons that come before this lesson create important foundation knowledge for your students to connect to. Those beginning lessons are creating a pool of prior knowledge for students to refer to as they have to think abstractly about 3D shapes. The design of these lessons are to meet the objective of the Common Core, to teach in-depth, but sequentially. First, I wanted them to take their basic knowledge of plane shapes learned in Kindergarten and learn the defining attributes. Next, I wanted them to use those defining attributes to categorize and illustrate plane shapes. Now, they took their knowledge of 2D shapes and constructed 3D composite shapes. If you have not already taught plane shapes, here is a good starting point.

Lessons building on one another
Staircase of Complexity: Lessons building on one another

# Making new shapes with shapes

Unit 6: Understanding Shapes
Lesson 6 of 7

## Big Idea: My first graders have been studying the defining attributes of 2D shapes. They are going to love using toothpicks and marshmallows to present their knowledge of 2D and create 3D shapes.

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8 teachers like this lesson
Standards:
Subject(s):
Math, Geometry, three-dimensional shapes, shapes, First Grade
40 minutes

### Jennifer Moon

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