The Case Study Compilation was developed with and for educators to provide examples of practice related to three questions: (1) What does it mean to focus on social-emotional development and the creation of positive learning environments?; (2) How can educators integrate their approaches to social, emotional, and academic development?; and (3) What does it look, sound, and feel like when Social-Emotional Learning (SEL) is effectively embedded into all elements of the school day? When read one at a time, the case studies offer snapshots of social-emotional learning in action; they describe daily routines, activities, and teachable moments within short vignettes. When read together, the case studies provide a unique picture of what it takes for a school to integrate social, emotional, and academic learning across grade levels, content areas, and other unique contexts. The Case Study Compilation can be used by any educator who works in a K-12 school setting, including teachers, paraprofessionals, counselors, SEL Directors, teacher leaders, school principals, and others. It may also be useful to professional development coaches, trainers, instructional leaders, and nonprofit professionals who support the work of K-12 educators. [These case studies were created in collaboration with TeachPlus MA and the exSEL Network.]