Los Angeles Universal Preschool (LAUP) is a nonprofit organization whose primary goals include supporting high-quality early education for children in Los Angeles County. One of the ways in which LAUP creates and supports quality in preschools is through its coaching program. This program pairs preschool teachers with dedicated coaches, who are trained by LAUP to help the teachers achieve their quality goals and adhere to the requirements of the LAUP network. There are three different types of coaches assigned to each preschool provider: Quality Support Coaches, Fiscal Support Coaches, and Program Support Coaches. This evaluation focused specifically on the role of the Quality Support Coaches and their interactions with teachers, and the word "coaches" as used in this report refers only to Quality Support Coaches. (author abstract)