The authors introduce the RALLY (Responsive Advocacy for Life and Learning in Youth) approach. RALLY is a school- and afterschool-based approach addressing academic success, youth development, and mental health for youth. Based on developmental and relational principles, RALLY's main goals are to promote students' resiliency, development, and academic functioning, as well as to reduce the typical adolescent's risks. By implementing a new professional role of RALLY practitioners, who are developmental specialists and interconnect the different social worlds of students, RALLY creates the resources to provide social opportunities and quality practices to meet students' needs and facilitate their growth. A three-tiered system helps to implement mental health and educational practice, thus providing differential support for students with different needs. Early identification of risks and resiliencies helps to avoid chronicity and pinpoint adequate treatments as soon as possible.