Canada’s Largest Youth STEM Event
Hosted annually by Youth Science Canada, the Canada-Wide Science Fair (CWSF) is Canada’s largest annual youth science, technology, engineering, and mathematics (STEM) event. For over 60 years, the CWSF has brought together the brightest young minds from across the country to showcase their research and innovations, compete for awards, and connect with peers who share their passion for discovery and innovation.
Our Purpose
The CWSF is more than just a competition—it’s a celebration of curiosity, creativity, and the pursuit of knowledge. The fair provides a platform for young scientists to:
- Present original research and innovations to experts, peers, and the public
- Receive recognition for their achievements in STEM
- Connect with like-minded peers from across Canada
- Gain exposure to career opportunities in STEM fields
- Develop communication and presentation skills
- Compete for medals, awards, scholarships, and international opportunities
How It Works
Each year, nearly 400 finalists in grades 7-12/Cégep are selected through a national network of over 100 regional STEM fairs spanning every province and territory. These exceptional students earn the opportunity to represent their region at the CWSF, where they compete for nearly $1 million in prizes, scholarships, and exclusive opportunities.
The week-long event includes:
- Project presentations and judging
- Interactive STEM activities and workshops
- Educational tours and social events
- Public exhibition days
- A prestigious awards ceremony
Project Categories
CWSF projects fall into two divisions:
Discovery – Projects that use the scientific method to answer a question through investigation and experimentation
Innovation – Projects that solve practical problems through technological design and innovation
Projects are further organized by the Youth Science Canada Challenge categories that address important issues facing our world today, and by age groups (Junior, Intermediate, and Senior).
History and Evolution
Since its inception in 1962, the CWSF has evolved to become Canada’s premier youth STEM event. The fair has traveled to communities across Canada, inspiring generations of young scientists and engineers. Many CWSF alumni have gone on to distinguished careers in science, medicine, engineering, and technology, crediting their CWSF experience as a pivotal moment in their academic and professional journeys.
Global Reach
Top projects from the CWSF may be selected to represent Canada at prestigious international competitions, including the European Union Contest for Young Scientists (EUCYS), the Regeneron International Science and Engineering Fair (ISEF), and other global STEM events.
The CWSF Experience
Participants consistently describe the CWSF as a life-changing experience that fosters lifelong friendships, builds confidence, and opens doors to future opportunities. Beyond the awards and recognition, the CWSF creates a community where young people can embrace their passion for STEM and connect with others who share their enthusiasm for discovery and innovation.
“Even without the awards, it is an experience of a lifetime…not exaggerating…IT IS THE EXPERIENCE OF A LIFETIME. You meet so many people from across Canada…meet every single person you can, leave any shyness behind you, and I promise you will have friends you will keep in touch with forever.” — CWSF Alum
Join the purpleSTEMwave
The CWSF is part of the purpleSTEMwave—a national movement that celebrates and unites young Canadians who transform their curiosity into action through STEM projects. By participating in regional STEM fairs and the CWSF, students become part of this vibrant community of young scientists and innovators.