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Playlist: Bookmarks

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!

Squiggles Introduction

What do you see in this squiggle?

Depth and Complexity: Patterns and Quadrilaterals

For Teachers

Why just “identifying patterns” isn’t deep enough.

Thanksgiving Photo Writing

Starting with an old-timey photo, students will write from a particular item’s point of view.

Fizz Buzz: A Counting and Divisibility Game

Ready for a tricky counting and divisibility game?

Writing A Thanksgiving Letter

What if an inanimate object could express thanks for a special person in your life? What would it write?

What’s In My Brain: Trapezoids or Not?

Which are trapezoids and which are not?

Same Perimeter, Different Area For Rectangles

Can two rectangles have the same perimeter but… different areas!?

Intersecting Angles and Streets

There can never be just one angle.

Chomp

Chomp away at your opponent in this grid-based strategy game.

Sprouts

Learn how to play the abstract, paper-and-pencil game Sprouts.

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.

Deducing the Area of Triangles

Using patterns, students try to deduce where that area formula came from.

Math Curiosity: Odds & Squares

Why does the sum of the first 5 odds also equal 5 squared?

Math Curiosity: Primes and Squares

Can any perfect square be written as the sum of two primes?

Math Curiosity: Finding Primes

Prime numbers are unpredictable! How can we possibly find them all? An Ancient Greek mathematician found one way!

Greekymon

Rather than just memorizing word parts, students will use those word parts to create four possible products.

The Game of 100

Who can get to 100 first in this simple, but delightful, math game?

Greek and Latin Dinosaur Names

Let’s create a new dinosaur using Greek and Latin stems!