Playlist: Bookmarks
Broken Calculator: 2-Digit Addition
This calculator adds two-digit numbers wrong, the same way every time. Crack the rule, then predict its next mistake.
Math Curiosity: Magic Triangles
Can you make each side of this triangle add up to 9 using the digits 1-6?
How Many Will There Be? Chip Off The Block
Give kids a taste of a sequence, let them build an understanding, and then see how far their predictions can take them.
How Many Will There Be? Earthworm
Give kids a taste of a sequence, let them build an understanding, and then see how far their predictions can take them.
Olympics: Medals by Population
Do big countries always have the most medals? Which smaller countries rank surprisingly high in the Olympics?
Olympics: Winter vs Summer Medal Count
Which country has a great balance between their summer and winter Olympic medals?
Looping Grid Art
Pick a few numbers, draw some corresponding lines on grid paper, and you’ll end up with some interesting, looping math-y art!
Ultimate (or Inception) Tic Tac Toe
What if each square on a Tic-Tac-Toe board had another Tic-Tac-Toe board inside of it?
Writing About Art: The Scream
Your students will turn the iconic painting The Scream into a vivid, sensory poem.
How Many Will There Be? Xs and Os
Give kids a taste of a sequence, let them build an understanding, and then see how far their predictions can take them.
Addition: 3 Digits Plus 2 Digits (Multiple Solutions)
Typical practice problems don’t move students up Bloom’s Taxonomy. With this framework, you’ll see kids stop and really think about how to approach multi-digit addition.
Writing A Thanksgiving Letter
What if an inanimate object could express thanks for a special person in your life? What would it write?
Parentheses: How big of a change can they make!?
Two tiny parentheses. One expression. How big of a change can they make? Bigger than you think.
How Many Ways: Times Equals Minus
How many different ways can you make this math statement true using only the digits one through nine?
How Many Ways: 2 Digits ÷ 1 Digit = 1 Digit
How many different ways can you make this math statement true using only the digits one through nine?
Undoing Multiplication With Division
Multiplication and division, natural foes, are constantly seeking to undo each other. Students will attempt to reverse the effects of multiplication by dividing once, twice, or even thrice!
Math Curiosity: Magic Squares
Imagine a 3×3 square in which every row, column, and diagonal have the same sum. That’s a magic square!
Math Curiosity: The Coloring Problem
No video gets me more email from students! How few colors can you use to color in any map so that no two, neighboring regions are the same color?
Why Is Our Calendar So Weird!?
Why are there 12 months? Why don’t weeks fit into months evenly? Why don’t weeks fit into the year evenly? What’s going on with the calendar!
A Donut Investigation
In this cross-curricular investigation, students will look into an intriguing question: do donuts or salads have more sugar? They’ll grapple with misleading information, bias, and use their math skills to create a visual representation of sugar in popular foods.
Persuasion and Packaging: Ethos, Pathos, and Logos
How does a drink’s packaging affect us emotionally and logically?
The Game of 100
Who can get to 100 first in this simple, but delightful, math game?
Math Project: What If I Bought Apple Stock Instead?
What if you had an original iPod and sold it compared to if you had bought the equivalent amount of Apple stock and sold that?