The purpose of this Guidebook is to describe the process and basic requirements for the student learning measures that are used as part of the teacher evaluation and support process. For aspects of the process 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 the Guidebook, "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 student learning process, 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. Two appendices are included: (1) Student Learning/Outcome Objective Scoring Lookup Tables; and (2) Online Resources.