## Looking for Patterns (Arithmetic Sequences and Finite Differences)

I bought and read Jo Boaler's "What's Math Got To Do With It?" last summer. She really gave me food for thought regarding grouping by ability and gender differences. I also read "Mathematical Mindsets" this [...]

## Polar Cards

Cindy Johnsonâ€™s Conic Cards are the inspiration behind Polar Cards. How she took the time to create 8 decks of conic cards is beyond me, but my students loved and learned from them. In my [...]

## Foci of Parabolas Exploration

You have to love the Internet and the inspiration you get from other teachers. I put together an investigation based on the tweet below. Inspired by a session at #T3IC last year, we used [...]

## Triangle Musings

My regular geometry students have struggled with the concept of which side measures can form a triangle. I don't know if it's the wording of theorem - the sum of any two sides of a [...]