Happy Numbers (03/29/2024)
Sarah’s Passing Drill (02/17/2024)
Sequences of Fractions (11/30/2023)
Diagonals in Rectangles (10/24/2023)
Fun with Paper and Scissors and Tape (06/23/2023)
Function Diagrams (05/25/2023)
Shadow Math (04/27/2023)
Celtic Knots at COABE 2023! (04/21/2023)
Billiards! (01/26/2023)
Music and Polypad (12/28/2022)
Story Tables (11/20/2022)
What Comes Next? (10/06/2022)
Hanger Diagrams (08/17/2022)
Graceful Labeling of Graphs (05/27/2022)
MoMath Area and Perimeter Puzzle (03/16/2022)
Egyptian Fractions (02/24/2022)
Representing Fractions (09/18/2021)
Stubborn as a Goat (06/07/2021)
Ring-a-Ding Numeration (05/03/2021)
Number Visuals (04/02/2021)
Sequences (03/15/2021)
A Chess Puzzle (02/04/2021)
Why are maintenance covers round? (12/22/2020)
A Pattern With Circles (11/16/2020)
A pile of coconuts (10/21/2020)
Rainbow Squares (09/27/2020)
Voronoi Patterns (09/24/2020)
Sums of Consecutive Numbers (follow-up) (09/11/2020)
Number Pyramids (06/20/2020)
Factor Graphs (05/12/2020)
Star Polygons! (05/03/2020)
Modeling the Coronavirus (04/26/2020)
Math Art Challenges (04/04/2020)
Decimal representations (04/02/2020)
Dividing a 2-digit number by the sum of its digits (03/29/2020)
Open Middle equations (02/13/2020)
The Game of Set (02/10/2020)
Apportionment Math! (12/03/2019)
Card Puzzles and Tricks (11/14/2019)
Election Math (10/10/2019)
“Reversed” Ages (09/19/2019)
Penny Collection (07/24/2019)
The Game of Life (06/25/2019)
Civic Statistics and Statistical Literacy (06/24/2019)
The Secretary Problem (06/05/2019)
Pentominoes! (05/05/2019)
Return to the Fold (04/20/2019)
Celtic Knots (03/21/2019)
Playing with Prime Factors (02/22/2019)
Temperature is Cool (02/02/2019)
Optimizing Social Security Benefits (12/15/2018)
Pedaling a Bicycle (09/18/2018)
The Mysterious Bicycle Tracks (08/30/2018)
Exploding Dots (06/28/2018)
Skellzies! (06/08/2018)
A Strange Algorithm (05/31/2018)
Factor Towers (05/16/2018)
The Wet Iphone Task (04/26/2018)
There’s More to Tic Tac Toe than You Know… (04/06/2018)
Divisibility Exploration (02/26/2018)
Thirteen Ways of Looking at Multiplication Tables (01/23/2018)
Mondrian Art Puzzle (12/09/2017)
Mark’s Metrocard (11/10/2017)
Multiple Factors (10/14/2017)
Tropicana Cash Wheel (07/20/2017)
Exploration of Consecutive Numbers (06/13/2017)
Growing Rectangles (05/19/2017)
Making Trains from Cuisenaire Rods (04/13/2017)
Multiple Ways of Multiplying (03/10/2017)
What Do You Do with a Dizzy Sailor? (02/08/2017)
Carl’s Basketball Problem (01/11/2017)
Gerrymandering Math (11/09/2016)
CAMI Roadshow: NCTM 2016 (11/03/2016)
Dana’s Rectangle (10/13/2016)
The Lawn Mower Problem (09/14/2016)
Grid Power (07/21/2016)
Making and Testing Conjectures: The Diagonal Problem (06/14/2016)
Millions and Billions (05/18/2016)
Resources from NCTM 2016 (05/14/2016)
Roller Derby (& probabilities in passing HSE exams) (04/19/2016)
CAMI Roadshow: COABE 2016 (04/11/2016)
Graphing Area vs. Perimeter (03/28/2016)
Keep it in the Family (with Pythagorean Triples) (03/08/2016)
Slip Sliding Away (01/08/2016)
Signed Number Pyramids (12/11/2015)
Pascal’s Triangle (11/13/2015)
Three-Act Math: Probability in Craps (10/13/2015)
Happy Numbers and the Melancoil (09/18/2015)
Three-Act Math: The Royal Flush (07/10/2015)
Three-Act Math: Super Stairs (06/09/2015)
CAMI Roadshow: 2015 NYC ABE Conference (05/16/2015)
Three-Act Math: Pyramid of Pennies (05/08/2015)
CAMI Grab Bag (04/14/2015)
The Mathematics of How CAMI Got Its Name (03/13/2015)
Problem-Posing with Visual Patterns (02/10/2015)
Pentagon Patterns (12/16/2014)
10 Problems: Our First Meeting! (11/12/2014)