Rhode Island educators believe that implementing a fair, accurate, and meaningful educator evaluation and support system will help improve teaching and learning. The primary purpose of the Rhode Island Model Teacher Evaluation and Support System (Rhode Island Model) is to help all teachers improve. Through the Model, the goal is to help create a culture where all teachers have a clear understanding of what defines excellence in their work; are provided with prioritized, specific, and actionable feedback about their performance; and receive support to continuously improve their effectiveness, regardless of the number of years they have been teaching. The purpose of this Guidebook is to describe the process and basic requirements for evaluating and supporting teachers with the Rhode Island Model. For aspects of the Rhode Island Model that have room for flexibility and school/district-level discretion, the different options have been clearly separated and labeled with a "Flexibility Factor." For the purposes of this Model, "teacher" means any public school employee working under a teacher certification whose primary responsibilities include instructional planning, managing a classroom environment, and student instruction. To help educators better understand "how" to best implement various aspects of the Rhode Island Model, additional resources are available on the Rhode Island Department of Education (RIDE) website, including online training modules, sample Student Learning/Outcome Objectives, and a suite of calibration protocols designed to help school and district leaders facilitate ongoing calibration exercises. Four appendices are included: (1) Student Learning Objective Scoring Lookup Tables; (2) Online Resources; (3) Teacher Professional Practice Rubric; and (4) Teacher Professional Responsibilities Rubric.