The document discusses Colorado's educator effectiveness evaluation system which was implemented statewide in 2013-2014 according to Senate Bill 10-191. It outlines the core components of the bill including basing 50% of evaluations on student growth and requiring three years of effective ratings for non-probationary status. The structure of evaluations for teachers and principals is described, splitting evaluations evenly between professional practice and student academic growth. Implementation support tools provided by the Colorado Department of Education are also summarized.