The Massachusetts Department of Elementary and Secondary Education (ESE) has supported a multi-year study of the Expanded Learning Time (ELT) initiative to learn about the process and impact of ELT. Abt Associates Inc. is conducting this research. The study has two components: 1) a planning and implementation component that explores the decision-making phase and subsequent execution of ELT in funded schools; and 2) an outcomes component that examines the outcomes of ELT for schools, teachers, and students. The overall ELT evaluation is guided by three research questions: (1) How has expanded learning time been implemented in schools that receive ELT grants?; (2) What are the outcomes of expanded learning time for schools, students, and teachers?; and (3) What is the relationship between implementation and outcomes? (Contains 2 figures and tables.)