This edited volume examines co-teaching and integrated service delivery for English learners (ELs). Through research and documentary accounts, it explores the collaborative instructional cycle—co-planning, co-instruction, co-assessment, and reflection practices—of co-taught programs for ELs. This volume presents current, classroom-based, practitioner-oriented research related to all aspects of co-taught programs for ELs and offers authentic evidence and practical recommendations that yield positive outcomes for this student population.