Recognizing the crucial role social and emotional learning (SEL) plays in ensuring the overall health and academic and future success of students, the Afterschool Alliance is committed to creating and sharing widely SEL tools, research, and resources that allow out-of-school time providers to better serve their youth. This toolkit helps explain what SEL is, how SEL connects to the afterschool field, and how to make the case to support SEL, as well as includes webinars, issue briefs, program spotlights, blogs, and more to highlight promising practices and strategies.