A few weeks ago, I agreed to teach a lesson on domain and range
in a Math 10C class. I told the teacher I’d make it interesting
and engaging. Shortly after making that promise, I realized I
had no idea at all how to make it interesting and engaging. I
did what I always do in those situations. I begged for help on
Twitter. It turns out I wasn’t alone in looking for ways to
teach Domain and Range. Marshall Thompson admitted he was also
interested in finding something. Don’t worry, Marshall, I’m
about to hook you up. Dan Meyer jumped in and was, as
advertised, not all that helpful. And he spelled cheques wrong.
I had given up hope. I was about to plan a typical boring
lesson. Then Peter Vandermeulen came through. Peter’s link was
to this file. It’s really all you need. It’s a nice, fun,
compelling and engaging way to get at Domain and Range. Peter
tells me he got the idea from a workshop in his district. I made
some additions and modifications, and I’ll explain the lesson
below. I’ll present it how I would do it