Evidence-based social/emotional learning (SEL) programs have been shown to have many benefits and are considered best practice in helping students apply the knowledge, attitudes, and skills necessary to understand and manage emotions. One school district undertook a multiyear process to move to a common school counseling core curriculum in the social/emotional domain. The process included curriculum selection, development, implementation, assessment, and revision. Preliminary results indicate that school counselors are delivering the standardized curriculum across schools, and most report that the program has a positive impact on students.