Put your students in a pickle!
See the PuzzlesProof K-12 Conference
curricular puzzles for K-12 teachers 

A MathPickle puzzle recently featured on Numberphile… suitable for kindergarten students and older… for the full write-up go here.

Creative Mornings talk about puzzle and board game design.

One of the best features of your puzzles is how they engage a wide spectrum of learners, something that is difficult for teachers. Your math puzzles are remarkable and children enjoy and learn from them regardless of their mathematical understanding. This is as close to a “silver bullet” as I’ve seen.

Jason Kornoely

Fourth Grade Teacher, Pine Ridge Elementary, Grand Rapids, Michigan

I stumbled upon your site,, this morning and two hours later I’m still there.  Just wanted to drop you a brief note to say thank you for all the great resources, ideas, and inspiring videos!  I can’t wait to use some these materials this Fall with my elementary mathematics methods students as well as try the unsolved problems with my two children.
Amy Tanner

Assistant Professor, Education Department, St. Catherine University

Co-Winner of the 2016 George Pólya Award by the Mathematical Association of America

The Graceful Tree Conjecture from 1967 is essential in every elementary student’s experience of mathematics. Click here to see it in the classroom.


MathPickle’s original dream was to get $1,000,000 prize money behind these thirteen unsolved problems of mathematics – one for each grade K-12. Click here to see the new dream.

For the poster of MathPickle’s ideas on elementary math education go here.

Please use MathPickle in your classrooms. If you have improvements to make, please contact me. I'll give you credit and kudos 😉

Gordon Hamilton

(MMath, PhD)