How Many C’s do the effective teachers you know use regularly? I recently attended an educational assessment conference in which Ronald Ferguson from the Harvard Kennedy School was the keynote speaker. He is an educational researcher who presented his work on teacher effectiveness. This research shows that there are seven C’s that make a difference in the learning environment. The most interesting part of his presentation was his work on the Tripod project with Cambridge University in which they survey children about their teacher to assess whether or not students agree with a variety of statements designed to measure these seven teaching practices.