To support implementation of Senate Bill 10-191, the Colorado Department of Education has developed model evaluation systems for principals (includes assistant principals) and teachers that meet all requirements of the law and State Board of Education Rules. The Colorado State Model Evaluation System for principals was piloted in 27 districts during the 2011-12 school year; the model principal and teacher systems are both being piloted this year (2012-13) prior to being offered as optional evaluation systems for all Colorado districts in 2013-14. Feedback from pilot districts is being collected to influence improvements to the principal and teacher systems.