Playlist: Bookmarks
Power – Blue Whale vs Krill
Sure, a Blue Whale is huge. But does a tiny krill have more power?
Fizz Buzz: A Counting and Divisibility Game
Ready for a tricky counting and divisibility game?
Greek and Latin Word Part Paths
How can we go from Biology to Immobile?
Parabolic Curve Art
Create mathematical art with curves that, well, aren’t curvy.
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!
A Lunar Survival Mission
A favorite of mine! This task is delightfully complex and ambiguous, forcing students to make choices without enough information and with no right answer. How will they survive on the moon for three days?
Math Curiosity: A Pattern Packed Triangle
Pascal’s pattern-packed triangle is a potent puzzle for pupils to ponder.
Evens and Odds – Addition and Subtraction
When we’re adding and subtracting, do evens make odds into evens? Do odds make evens odd? Which one has… more power!?
Punctuation Power
In a sentence, punctuation may seem meek when compared to those mighty words, but punctuation has incredible power over the meaning of a sentence. Students will try re-punctuating sentences to find new meanings – without changing a single word!
Not Like The Others: Planets
Which of these planets is not like others? Well, it sure looks simple at first. But each option could be the one that doesn’t fit in.
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: Times Equals Times
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?
Dots and Boxes
Who can make the most boxes from dots in this strategy game?
Math Curiosity: Odds & Squares
Why does the sum of the first 5 odds also equal 5 squared?
Multiple Meaning Matcher – Introduction
Your students will try to match up definitions that belong to the same homophone in this brain-boggling vocab puzzle.
Math Curiosity: Finding Primes
Prime numbers are unpredictable! How can we possibly find them all? An Ancient Greek mathematician found one way!
Analyze and Create Misleading Graphs
Let’s make some intentionally bad graphs to learn how to spot poorly made graphs.
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!
The Game of 100
Who can get to 100 first in this simple, but delightful, math game?
Teaching Empathy With Faberge Eggs
The story of the Fabergé Eggs is heartbreaking. It’s also the perfect way to build empathy in your classroom.
Math Curiosity: Collatz Conjecture
The Collatz Conjecture: start with any number and get to 1 using just two rules. It seems to always work…
An Inductive Exploration Of Geometry
For TeachersWith inductive thinking, students will work from parts to whole, discovering big ideas along the way!
Writing Clear Directions
Can you write directions so clear that a group of kids can put a toy together with no illustrations?