As teachers gear up for the Common Core State Standards (CCSSM), the importance of Transformation Geometry is growing. I think teachers are a little concerned about this new approach to geometry because of their lack of familiarity with the power of Transformational Geometry. However, in my opinion, students gain a deeper understanding of geometry and proof with Transformational Geometry. A student will be more successful using any of the dynamic geometry software such as Cabri or Sketchpad if they think in tranformations!

Geometer's Sketchpad

Introduce your students to reflections (flips), translations (slides), rotations (turns), and dilations (shrink and grow) with this file for Geometer's Sketchpad.

You don't have Sketchpad... here are some alternatives with great features
  1. Ancient Greek Geometry - play with constructions on this site -
  2. Try the free download of GeoGebra -
  3. has a great graphing calculator