This is a resource for supporting Colorado school district employees, administrators, and teachers in developing an understanding of the Rubric for Evaluating Colorado Teachers. As individuals apply the rubric to their own teaching and to that of others, the Resource Guide can be used to support observers and coaches in accurately identifying evidence for the professional practices and for classroom teachers to accurately reflect on their teaching and plan for implementation of specific practices in their instruction. The research and examples provided along with the glossary can be used to support the development of a common language by which Colorado school district employees can analyze, reflect, and plan instruction.