The Wallace Foundation's Partnerships for Social and Emotional Learning Initiative is a six-year initiative that The Wallace Foundation launched in 2017 to explore whether and how children benefit when schools and their out-of-school-time programs partner to improve social and emotional learning (SEL), as well as what it takes to do this work. According to the Collaborative for Academic and Social and Emotional Learning, SEL is "the process through which children and adults understand and manage emotions, set and achieve positive goals, feel and show empathy for others, establish and maintain positive relationships, and make responsible decisions." This case study explores how Denver's Cowell Elementary School and its out-of-school-time (OST) partner, Discovery Link, worked together to find time for SEL and to provide consistent SEL instruction during and after school. Explicit SEL instruction became increasingly more frequent over three years, and a large majority of school and OST instructors used the intended SEL rituals. The school and OST program identified protected time for SEL instruction in each of their schedules. The school and OST program created a strong partnership that included staff from both organizations in decisionmaking about the implementation of SEL. School and OST program staff developed common goals and shared terminology about SEL. [For "Strengthening Students' Social and Emotional Skills: Lessons from Six Case Studies of Schools and Their Out-of-School-Time Program Partners. Lessons from the Partnerships for Social and Emotional Learning Initiative. Volume 2, Part 1. Research Report. RR-A379-4," see ED623577.]