Mathematics and computing contests are a fun way for students to grow their problem-solving skills, build confidence and get creative with math and computer science. Designed by teams of expert mathematicians and educators for Grades 5 to 12, CEMC contests are a great fit for students across a range of abilities—from learners who want to explore math and computer science and develop their confidence to advanced students who want to stretch their limits.
CEMC mathematics and computing contests
In the table below, you will find information about all CEMC contests, contest dates and ordering deadlines for the contest year 2026/27. We will begin accepting contest orders for the 2026/27 contest year in September 2026.
These contests are available in English and French.
- Contest dates:
- North and South America: Wednesday, November 18, 2026
- Outside North and South America: Thursday, November 19, 2026
- Ordering deadline: Thursday, October 22, 2026
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
This contest is available in English only.
- Contest dates:
- North and South America: Monday, November 9, 2026 to Friday, November 20, 2026
- Outside North and South America: contact us
- Ordering deadline: Monday, October 26, 2026
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
This contest is available in English and French.
- Contest dates:
- North and South America: Wednesday, February 17, 2027
- Outside North and South America: Thursday, February 18, 2027
- Ordering deadline: Thursday, February 11, 2027
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
These contests are available in English and French.
- Contest dates:
- North and South America: Tuesday, February 23, 2027 and Wednesday, February 24, 2027
- Outside North and South America: Wednesday, February 24, 2027 and Thursday, February 25, 2027
- Ordering deadline:
- Deadline for schools
- in India – Wednesday, January 27, 2027
- outside of Canada and India – Tuesday, February 2, 2027
- in Canada – Tuesday, February 9, 2027
- Deadline for schools
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
This contest is available in English and French.
- Contest dates:
- North and South America: Tuesday, April 6, 2027
- Outside North and South America: Wednesday, April 7, 2027
- Ordering deadline: Thursday, March 11, 2027
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
These contests are available in English and French.
- Contest dates:
- North and South America: Wednesday, April 7, 2027
- Outside North and South America: Thursday, April 8, 2027
- Ordering deadline: Thursday, March 11, 2027
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
This contest is available in English only.
- Contest dates:
- North and South America:
- At UWaterloo: Tuesday, April 13, 2027
- In-school event: Wednesday, April 14, 2027 or later
- Outside North and South America:
- In-school event: Wednesday, April 14, 2027 or later
- North and South America:
- Ordering deadline:
- Registration deadline for the lottery to participate at UWaterloo: Thursday, November 19, 2026
- In-school event: Monday, April 12, 2027
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
These contests are available in English and French.
- Contest dates:
- North and South America: Monday, May 10, 2027 to Friday, May 21, 2027
- Outside North and South America: Monday, May 10, 2027 to Friday, May 21, 2027
- Ordering deadline: Thursday, April 22, 2027
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
This resource is available in English and French.
- Contest dates: Tuesday, June 1, 2027 or later
- Ordering deadline: Thursday, May 27, 2027
We will begin accepting contest orders for the 2026/27 contest year in September 2026.
Benefits of participating in a CEMC contest
CEMC contests help participants:
- discover and grow a love of mathematics and computing,
- foster creative problem-solving, critical thinking, and analytical skills, and
- learn about new concepts to make connections across topics in mathematics and computing.
Since CEMC contests are challenging yet achievable activities for young learners, they also build students' confidence in their ability to tackle difficult problems — a key ingredient for student success both inside and outside the classroom.
Downloadable resources
2025/26 Contest Posters:
2025/26 Teacher Flyers:
2026/27 Contest Posters:
How we create contests
CEMC contests are crafted through collaboration among mathematics and computer science educators. They design problems that reflect curriculum topics, promote critical thinking, and encourage creativity, ensuring clarity, correctness, and appropriateness for each grade level. These contests aim to provide engaging and challenging experiences that foster students' mathematical and computational skills.