Ready to bring KenKen® to your classroom?
Invented by a teacher and trusted by thousands more. Join the educators using KenKen to make math engaging, build critical thinking, and watch students thrive.
Used in teaching and research at
- Harvard
- Cornell
- Stanford
- Yale
- Brown
- University of Pennsylvania
- UCLA
- Columbia
- University of Michigan
- Michigan State
- Scholastic
Why Teachers Love KenKen
Explore why educators are hooked on KenKen, and why students are always eager for the next challenge.
Teaching Students to Play
A walkthrough of the rules as you would run them in front of a class: the grid, the cages, and the first few moves that make the rest obvious.
Mental Math Mastery
Every puzzle is mental math in disguise. Students drill all four operations without realizing they are drilling.
Critical Thinking
KenKen rewards the question "what if?" Students learn to test, eliminate, and reason their way to a single right answer.
Growth Mindset
In KenKen every solve is earned. Students learn that a little struggle is part of getting stronger, one grid at a time.
Inclusive Learning
From 4×4 beginners to 9×9 champions, every student gets a puzzle that meets them where they are. No one left behind, no one bored.
Zero Prep Required
Print it, project it, or open it on any device. A fresh puzzle is ready every morning, no lesson plan required.
Built for Problem Solvers
The reasoning skills students build here transfer straight to word problems, science, and any subject that rewards a logical mind.
Tetsuya Miyamoto
Miyamoto taught mathematics in Yokohama, and he had grown tired of the sound of his own voice. So in 2004 he stopped lecturing, drew a small grid on the board, and let the room work.
He called the method the Art of Teaching Without Teaching, and he put the thinking behind it plainly: “if you give children good learning materials, they will think and learn and grow on their own.”
The grid he drew that day is the one your students will solve this week.
One puzzle, four easy steps
KenKen slots into the day you already run. Here is the whole routine.
Choose a grid size
Start at 3×3 for early grades and scale up to 9×9 for your fastest thinkers. One puzzle, every level.
Hand out the daily puzzle
Print it, project it, or share the link. No accounts, no setup, no photocopier jams the night before.
Let them reason it out
Students test, eliminate, and defend their thinking while you circulate and nudge the ones who need it.
Review as a class
Walk through the logic together and celebrate the clever strategies that finally cracked the grid.
Research and classroom resources
Peer-reviewed writing on why the puzzle builds reasoning, a booklet you can teach from tomorrow, and notes from the classroom. No sign-up, no email required.
Hear From Fellow Educators
Teachers across every grade share their KenKen classroom stories.
Join the KenKen Classroom Program
Free puzzles delivered weekly, ready for any grade, no strings attached. Over a million students already get their KenKen this way.
Sign up for the free KenKen Classroom Program and we will handle the rest.