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CCSS Math Standard: 5.G.3

Classify two-dimensional figures into categories based on their properties. Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.

What’s In My Brain: H vs Arrow
What’s In My Brain: H vs Arrow
Two columns. One is an example, one isn’t. Can you figure out the hidden rule before the big reveal?
Gr 1, 2, 3, 4, 5, 8
What’s In My Brain: Pentagon vs Pentagon
What’s In My Brain: Pentagon vs Pentagon
We’re looking at regular vs irregular polygons.
Gr 1-8
Grouping Shapes by Parallel and Perpendicular Sides
Grouping Shapes by Parallel and Perpendicular Sides
Which shapes go together based on parallel and perpendicular lines?
Gr 1, 2, 3, 4, 5, 8
Letters With Symmetry
Letters With Symmetry
Let’s group letters by their symmetry, then create symmetrical words, and then symmetrical sentences!
Gr 3, 4, 5, 6, 8
Geometry Image: Esplanade Theaters
Geometry Image: Esplanade Theaters
What odd and interesting shapes can your students find in this geometric image?
Gr 1, 2, 3, 4, 5, 8
Geometry Image: University Ave
Geometry Image: University Ave
What odd and interesting shapes can your students find in this geometric image?
Gr 1-5
Geometry Image: Victoria Conference Center
Geometry Image: Victoria Conference Center
What odd and interesting shapes can your students find in this geometric image?
Gr 1-5
Geometry Image: Skytree
Geometry Image: Skytree
What odd and interesting shapes can your students find in this geometric image?
Gr 1, 2, 3, 4, 5, 7, 8
Geometry Image: Steigerwald
Geometry Image: Steigerwald
What odd and interesting shapes can your students find in this geometric image?
Gr 1, 2, 3, 4, 5, 7
What’s In My Brain: Trapezoids or Not?
What’s In My Brain: Trapezoids or Not?
Which are trapezoids and which are not?
Gr 1-8
The Angles of a Triangle
The Angles of a Triangle
Why tell a kid the rules of a triangle when they can discover them!?
Gr 1, 2, 3, 4, 5, 7, 8
Grouping Quadrilaterals In A Hierarchy
Grouping Quadrilaterals In A Hierarchy
Can we classify quadrilaterals like we classify living things?
Gr 1-5