In this video I work through 68 examples of factoring quadratic expressions when a is not equal to one. The first couple of ...

iPad is the modern day slate. No longer do kids practice math on sheets of rough paper and black slates; the day isn’t far when kids start interacting with devices from the day they’re born. A step in ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

When I was a new teacher, I wanted my students to see math not just as numbers and equations but as a tool to understand the world around them. My goal wasn’t for them to simply memorize formulas to ...