Dr. Marzano, a nationally known educational researcher and developer of the Marzano Teacher Evaluation Model and the Marzano School Leadership Evaluation Model, discusses how districts may use teacher evaluation models as primarily either measurement systems –which provide a static picture of a teacher’s performance at a given point; or as growth systems—which track improvements in teacher pedagogy over time. - See more at: http://www.marzanoevaluation.com/news/teacher-evaluation-whats-fair-whats-effective/#sthash.KaHjK1uL.dpuf