“Everything is so linear, but this makes me think diagonally!” ~ a student describing Byrdseed.TV

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Playlist: Math

How Many Ways: Add to 50

How Many Ways: Add to 50

Fill in the blanks so two numbers add to exactly 50, using each digit only once. Then find the sneaky ways that start with a zero.

Fizz Buzz: Counting by 2s and 3s

Fizz Buzz: Counting by 2s and 3s

A counting game where twos become “fizz” and threes become “buzz.” Easy to learn, surprisingly hard to survive.

Broken Calculator: 2-Digit Subtraction

Broken Calculator: 2-Digit Subtraction

This calculator gets subtraction wrong the same way every time. Can your students crack its broken rule?

Adding and Subtracting Fruit

Adding and Subtracting Fruit

Use super cute fruit to introduce algebraic thinking to your young math students.

Crossing Every Bridge Exactly Once (aka Eulerian Paths)

Crossing Every Bridge Exactly Once (aka Eulerian Paths)

How can you cross each bridge in this city exactly once?