Playlist: Bookmarks
Crossing Every Bridge Exactly Once (aka Eulerian Paths)
How can you cross each bridge in this city exactly once?
Words Within Words: ORNAMENT
How many words can you find within ORNAMENT?
Words Within Words: WREATH
How many words can you find within WREATH?
Special Gifts with Special Requirements
Your special friends sure have some unique gift needs!
Investigating Population Changes
How have the ages of three countries’ populations changed from 1950 to 2020? And what problems might that create?
Fizz Buzz: A Counting and Divisibility Game
Ready for a tricky counting and divisibility game?
Game: Number Scrabble
What if we played Tic-Tac-Toe with numbers and instead of three-in-a-row, we add up to 15? Well… then we’d have Number Scrabble!
Game: Snakes
In this grid-based strategy game, who will be the last to add to the snake?
Math Game: Heaps
Try this a simple (but surprisingly strategic) subtraction game!
Math Curiosity: Klauber’s Triangle
In 1932, a leading authority on rattlesnakes, Laurence Klauber, discovered a startling pattern within a triangle of primes.
Remixing A Holiday Poem
Let’s take a classic Christmas poem and remix it to work with another holiday!
Writing A Story About Fraction Equivalence
When fractions take on a new denominator, it’s as if they’re wearing a disguise – same value, new look. So let’s write a story about fraction equivalence starring a fraction who needs to fit in with a new group.
Intersecting Angles and Streets
There can never be just one angle.
Student Introductions with Complexity and Frames
How have you changed over time? Students introduce themselves through the lens of change — and learn a Depth and Complexity tool in the process.
Student Introductions With Depth and Frames
Want to introduce the tools of Depth and Complexity and learn more about your students and introduce the Frame graphic organizer? Have I got the activity for you!
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?
Sprouts
Learn how to play the abstract, paper-and-pencil game Sprouts.
More Specific than “Smart”
When students are told that they’re “smart”, what does this word actually mean to them? (Psst. It isn’t what we intended.)
Fractals: Sierpinski’s Triangle
What if this triangle pattern just kept repeating… forever!?
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.
Fraction Puzzlers: Add and Subtract Fractions To Reach A Number
You only have six digits to form three fractions. Can you combine them to get to 0?
Educational Valentines
Let’s make valentines with an educational twist!
How to Play Go
Ready to learn a 2,500-year-old Chinese board game? Let’s… Go!
How Many Students Can Fit On The Playground?
So… just how many kids could we cram onto the playground?
Math Curiosity: Palindromic Number Conjecture
Using this one weird trick, it seems that you can turn any number into a palindrome!
Greekymon
Rather than just memorizing word parts, students will use those word parts to create four possible products.
Math Curiosity: Collatz Conjecture
The Collatz Conjecture: start with any number and get to 1 using just two rules. It seems to always work…
A Grid-Based Fraction Project
You’ve got 60 spaces on a grid to create an amusement park, a house, a farm, or whatever you’d like. Divide it into seven pieces, order it by size, combine into two halves, and more in this fraction project.