Flag

Caribou in Covid: Contests are running online as usual. Check out the FAQ for further questions.
Math Games, Practice Tests, and Challenges | Caribou Contests
Prepare for Dots

Next interactive game question for all grades: Dots

You'll need to connect the dots to beat the computer during this contest!
Try the Calcrostics Puzzle!

Practice for the interactive Calcrostic challenge

Flex your math muscles and sleuthing skills!
For more puzzles, pick up the Puzzle Book in our Online Shop!
Caribou Turkey

The Online Shop is now in Turkish!

Our online shop now accepts credit card payments in Turkish Lira. Anyone can access our online shop in Turkish by selecting "Language" in the menu and picking Turkish.
Support Ukraine!

Free Math Resources and Contest Participation for Ukrainian Children

Students from Ukraine can try Caribou content for free. Go to the Online Shop for details.
See what's in stock in the Online Shop!

Tired of waiting for the next Caribou Contest?

Purchase access to our math resources to keep you busy and prepared!
Caribou during COVID

Caribou during COVID?

Students can access all content, even the contests, from home or school.
Click to see common COVID-related questions.
Game image

Random Game: Chess

This classic improves fluid intelligence, requiring planning, pattern-recognition, and concentration.
Previous Next

Today's Calcrostic Puzzle

 a +  a = bc
 × ×  × ×  ×
 c /  d =  e
 = =  = =  =
fe - gh = gh
What is This? | How to Solve It?

Yesterday's Solution

 53 +  53 = 106
  × ×   × ×   ×
  8 /   4 =   2
  = =   = =   =
424 - 212 = 212

Follow or subscribe for updates:

Find us on YouTube    Find us on Dailymotion    Find us on Twitter    Find us on Facebook    Find us on Instagram    Receive updates by email