Grade 1 · Geometry
Comparison of 2D Shapes and 3D Objects
Grade 1 geometry deepens Kindergarten shape work in two key ways: students sort using one attribute AND explain the rule, and they compose new shapes from simpler ones. Putting two triangles together to make a square is geometric understanding, not craft. First Peoples art, especially Northwest Coast formline art with its ovoids and u-forms, offers rich connections between geometry and living cultural practice.
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 one attribute and explain the sorting rule
✓Compare shapes and objects found in the environment using mathematical language
✓Use positional language: up, down, in, out, beside, in front of, behind, between
✓Replicate composite 2D shapes: e.g., put two triangles together to make a square
✓Identify 2D shapes in First Peoples art, including ovoids and u-forms in Northwest Coast formline art
✓Describe relative positions precisely using multiple positional terms
BUILDS ON