# Multilink Cube 3D Quick Image

## 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.
• Identify congruent lengths, angles, and faces of three-dimensional objects by mentally and physically matching them, and determine if the objects are congruent.

## Context

• This is a teacher led activity that can be conducted with a whole class or small groups.

## Materials

• Computer and projector
• Multilink Cube 3D Quick Image PowerPoint (Appendix A)
• Multilink cubes (5 blue, 5 red, and 5 green per student)

## Lesson

• Tell students you will be showing them an image of a structure and you want them to try and hold the image in their mind to recreate it.
• Flash one image from the Multilink Cube 3D Quick Image PPT (Appendix A) for five seconds, then hide the image.
• Invite students to use multilink cubes to recreate the image from memory.
• Depending on the complexity of the shape and the needs of the students, the image can be shown again to allow students to notice additional features while they build.
• After students are finished, show the image again. Students can compare the original structure to their own.
• Facilitate a discussion about studentsâ€™ strategies for how they approached the task. Some questions to extend student thinking:
• Did you find it easy, medium or difficult to remember the shape? What made it that way?
• Does the shape resemble anything?
• How many multilink cubes in all were needed for this shape? Can you suggest a way to make it easier to count?
• Repeat with each image.

## Look Fors

• What kind of spatial language are the students using amongst themselves and in group discussions?
• Are students closing their eyes to visualize the object?
• Are students gesturing in any way to maintain the object in their memory?
• Are students counting in any way to remember the orientation of the blocks?

## Related Lessons

This lesson supports the development of composing and decomposing 3D objects by communication with the use of positional language.