A summary of a study of a coaching professional development model for center-based and family child care teachers in Los Angeles Universal Preschool (LAUP) that: documents and explains the coaching process; identifies successes, challenges, and lessons learned; and defines the logic model for the coaching, based on 159 conversations with coaches and teachers, 78 activity logs from coaches, fall and spring interviews with 42 teachers, and questionnaires from 16 coaches