Playlist: Third Grade Math Think Tank Cycle 1
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.
Bad Graphs: Teacher Votes
One bar looks twice as tall, but the vote was nearly a tie. Students uncover the sneaky scale, then build their own misleading graph.
How Many Ways: Multiply, Then Add to 22
Fill in the blanks so the expression equals exactly 22, using each digit only once. Then change 22 to 24 and watch most of the solutions disappear.
Investigating Population Changes
How have the ages of three countries’ populations changed from 1950 to 2020? And what problems might that create?
How Many Will There Be? Desks
Give kids a taste of a sequence, let them build an understanding, and then see how far their predictions can take them.
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?
Doubling Dollars
Say you have a dollar. Say you can double that dollar each day: $1, $2, $4, and so on. How long will it take to reach… one million dollars? Not as long as you might think!
Analyze and Create Misleading Graphs
Let’s make some intentionally bad graphs to learn how to spot poorly made graphs.