Rhode Island educators believe that implementing a fair, accurate, and meaningful educator evaluation and support system will help improve teaching, learning, and school leadership. The primary purpose of the Rhode Island Model Building Administrator Evaluation and Support System (Rhode Island Model) is to help all building administrators improve. The goal of the Rhode Island Model is to create a culture where all building administrators 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 working as a building administrator. The purpose of this Guidebook is to describe the process and basic requirements for evaluating and supporting building administrators 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" box to highlight where schools and districts have an opportunity to customize aspects of the Rhode Island Model and establish policies to meet their local needs. For the purposes of the Rhode Island Model, "building administrator" means any public school employee working under a Building Level Administrator certification. 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 Objectives. [For "Rhode Island Model Evaluation & Support System: Building Administrator. Edition IV," see ED594937.]