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CCSS Math Standard: 2.G.1

Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.

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
Math Curiosity: Magic Triangles
Math Curiosity: Magic Triangles
Can you make each side of this triangle add up to 9 using the digits 1-6?
Gr 1, 2, 3, 4, 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
How Many Will There Be? Triangles Within Triangles
How Many Will There Be? Triangles Within Triangles
A triangle splits and splits and splits again. How many will there be in step 20?
Gr 1-4
Math Curiosity: Klauber’s Triangle
Math Curiosity: Klauber’s Triangle
In 1932, a leading authority on rattlesnakes, Laurence Klauber, discovered a startling pattern within a triangle of primes.
Gr 1-5
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
Intersecting Angles and Streets
Intersecting Angles and Streets
There can never be just one angle.
Gr 1, 2, 3, 4, 7, 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
Deducing the Area of Triangles
Deducing the Area of Triangles
Using patterns, students try to deduce where that area formula came from.
Gr 1, 2, 3, 4, 6, 7