Although skills needed by out-of-school time practitioners can be introduced during training, many skills can only really be learned on the job with ongoing support and supervision provided by a "coach." Research from both the education and out-of-school time fields supports the value of staff coaching as a professional development tool, and staff coaching has been found to be a component of high-performing out-of-school time programs. In an effort to expand what is known about staff coaching, Child Trends recently conducted a literature review on this topic. Additionally, Child Trends collected data on staff coaching as part of a study on the role of frontline staff in the effective implementation of out-of-school time programs. This brief presents findings from that study and the literature review and links these findings to effective strategies for staff coaching in out-of-school time programs. The brief also describes these strategies. (Contains 1 note.) [For Part 2, see ED504268.]