The CASEL Guide to Schoolwide SEL Essentials is a concise, printable mini-book designed to support school teams in implementing systemic social and emotional learning (SEL). It offers illustrated overviews of the four focus areas crucial for schoolwide SEL and includes fundamental resources within each section. This guide serves as a valuable tool during professional learning sessions or as a quick reference for coaches and SEL team leaders, aiding in the creation of caring, participatory, and equitable learning environments that promote students' social, emotional, and academic growth.