Critical Service Learning Toolkit offers a strengths-based, interdisciplinary approach to promoting social competence while enhancing emotional and academic skill development. Designed as a user-friendly guide to carrying out successful CSL projects, this Toolkit provides practitioners with step-by-step assistance in planning, implementing, and evaluating Critical Service Learning (CSL) projects in elementary and high schools. CSL trains youth to become active and conscientious citizens through engagement and leadership experiences that meet real needs in the community. This approach is unique in that it places the youth/student at the center of the process. Prioritizing social and emotional learning (SEL) and school engagement, CSL changes the role of the school-based, counseling professional into that of a facilitator who encourages skill-building, reflection, and civic engagement. Cultivating self-awareness, social-consciousness, and critical-thinking skills, brainstorming and community web mapping activities serve as the cornerstone of CSL and allow youth to become comfortable articulating concerns about their communities. By extending learning beyond the classroom and into the community, CSL enhances what is taught throughout the school curriculum, at all levels, and fosters a sense of civic responsibility and social agency.