This study investigated the ways in which the Science Mentoring Project, an afterschool program with a youth development focus and mentoring component, helped fifth-grade participants develop key competencies in five areas: personal, social, cognitive, creative, and civic competencies. Development of these competencies, in turn, positively affected participants’ school experiences. Using program observations, teacher interviews, student surveys, a student focus group, and mentor feedback forms, researchers studied how—not just whether—the project’s youth development activities affected school