Grouping Shapes by Parallel and Perpendicular Sides

Which shapes go together based on parallel and perpendicular lines?

Letters With Symmetry

Let’s group letters by their symmetry, then create symmetrical words, and then symmetrical sentences!

Geometry Image: Esplanade Theaters

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: University Ave

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: Victoria Conference Center

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: Skytree

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: Steigerwald

What odd and interesting shapes can your students find in this geometric image?

What’s In My Brain: Trapezoids or Not?

Which are trapezoids and which are not?

Intersecting Angles and Streets

There can never be just one angle.

The Angles of a Triangle

Why tell a kid the rules of a triangle when they can discover them!?

Grouping Quadrilaterals In A Hierarchy

Can we classify quadrilaterals like we classify living things?

Lines, Line Segments, Rays, and Infinity!

A lesson about lines, line segments, and rays that avoids dull memorization. Instead, we ponder this delightful question: Which is longer, a ray or a line? Then, kids consider what these different geometric concepts would think about each other.