Grade 2 · Geometry
Multiple Attributes of 2D Shapes and 3D Objects
Sorting by two attributes at once is an early form of logical AND reasoning. A square belongs in the group of shapes with 4 sides AND the group of shapes with equal angles. Two-attribute sorting forces students to hold two criteria in mind simultaneously and find shapes that satisfy both. This logical structure underlies classification in science, database querying, and all of formal mathematics.
LESSON VIDEO
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Lesson video
A short walkthrough to play in class or assign for flipped/at-home viewing.
WHAT STUDENTS WILL LEARN
✓Sort 2D shapes and 3D objects using two attributes and explain the sorting rule
✓Describe, compare, and construct 2D shapes: triangles, squares, rectangles, circles
✓Identify 2D shapes as the faces of 3D objects
✓Analyse shapes from Northwest Coast First Peoples art: ovoids, U-forms, split U-forms
✓Use a Venn diagram to represent two-attribute sorting