CEMC

For those who have never heard of or used it, the CEMC is a great site for starting up a math club or for introducing problem solving and enrichment to your classes. It's also a go-to for math contests!

What is the CEMC?
The Centre for Education in Mathematics and Computing. It's run through UWaterloo.

Problem Solving
One of my absolute favourite features of the CEMC is the Problem of the Week section. There are archives of past problems, but also problems that are updated weekly, for different grade levels. When we run Math Club (Thursdays at lunch) or Math Circle (Fridays after school), we often give students a Problem of the Week to solve. We often offer two different levels (mostly because we draw in a very strong crowd). Students will work away and then will share their solutions. Many friendly arguments have come from this - yes... kids arguing about math. Love it!
I tried some of these problems with my standard grade 11 class, and the grade 7/8 problem was a good level for them, as they haven't had much exposure to rich problems in their previous math classes. Now, some will try the grade 9/10 problem.

Courseware
The CEMC offers tools for teaching grade 12 Calculus and Vectors, as well as Advanced Functions and Pre-Calculus. We often refer stronger students to these sources for independent learning (in Saskatchewan, we don't offer these courses, so those who are considering school in Ontario will often peruse this resource).

Contests
UWaterloo is known for the cornucopia of contests they run each year. A huge focus of our Math Club and Math Circle is preparing students for these contests, so we use previous contests for practice. We were actually asked by UWaterloo to host the Canadian Team Math Contest for all of Saskatoon schools, and we were able to bring out about 100 students.

Conference
Finally, the CEMC puts on a summer conference for math teachers (and one for comp sci teachers), which attracts people from all over the world. Definitely a great conference - worth checking out!