The Math Guy

Circle properties are new to the Grade 9 de-streamed math course here in Ontario. Personally, I have always enjoyed these: not just the prov...

I recently spent two thought-provoking days at the Ontario Mathematics Co-ordinators Association's annual conference. The theme was on h...

An interesting thing happened in a Grade 9 class recently. I was doing a  coding activity looking at so-called Fibonacci numbers  where stud...

I tried this activity in Heather Lyon's MTH1W class using Polypad on Mathigon to help illustrate algebraic expressions. First Q: if thi...

Last week I went into a Grade 9 class that had just begun to learn about simplifying polynomials by collecting like terms. I had an idea for...