# See It, Build It, Check It

## Curriculum Goal

#### Primary: Geometry and Spatial Sense

• Compose and decompose various structures, and identify the two-dimensional shapes and three-dimensional objects that these structures contain.

## Context

• Students and teacher will be sitting on the carpet in a circle.

## Materials

In-Person Version:

• 2D shape outlines (Appendix A)
• Pattern blocks for each student

Online Version:

## Lesson

• Show students an example of a 2D shape outline (Appendix A) and show the solution of the outline filled with shapes. Explain that this will be the task they will be doing.
• Present students with the outline of a 2D shape (Appendix A) and have them construct the shape using pattern blocks.
• For the online version, present students with the outline of a 2D shape (Appendix A) and have them construct the shape using pattern blocks google slides (Appendix B)
• For the next challenge, quickly present the outline and then hide it from view.
• Have students construct the shape from memory. Students may require another opportunity to view the shape. Feel free to show the outline again to help them with the challenge.
• Give students time to share their results with a partner, in a small group or with the whole class.
• Facilitate a discussion around memory strategies (e.g., noticing symmetry, grouping, repetition, thinking about the number of shapes used) and the different ways of composing the same 2D shape.
• Ask students to compare how they constructed their 2D shape and talk about the strategies they used when building it from memory.
• Proceed to the next slide in Appendix A to present the students with a new 2D shape challenge.

## Extensions

• Show students a filled in pattern block shape. Hide the shape and have them draw the outline from memory (see Appendix A for an example).

## Look Fors

• Are students able to visualize the arrangement before placing the pieces? Ask the student what they are visualizing.
• What kind of language is being used to describe what students are visualizing? Listen for words related to location, distance, orientation and direction (e.g., left, right, up, down, angle, turn).

## Related Lessons

Students recreate the missing half of an image using horizontal or vertical lines of symmetry.