The first lesson in my Triangle Congruence unit is about triangle theorems.  This is the lesson with the Triangle Sum Theorem, the Exteri...

Last time, I shared some cool videos for teaching slope .  Today, I’m following that up with a slope foldable that I found that I love! ...

I feel like some lessons just lend themselves to corny examples or short videos at the end of the lesson.  So, I thought I’d do some ...

Today is another interactive notebook page idea!  In Geometry, right before we start proofs, I teach a lesson with the Algebraic...

Every year in Geometry, I spend a class period “playing” with optical illusions.  I usually spend one full 45-minute lesson on opti...