The eMINTS professional development programs are designed to help teachers learn how to integrate technology into their teaching, using instructional strategies that promote inquiry-based learning and encourage collaboration and community building among students and teachers. The eMINTS programs considered in this evaluation include: (1) eMINTS Comprehensive Professional Development (Comp PD), a two-year program consisting of approximately 250 hours of teacher professional development and support, for teachers in school-designated grades, including 10-12 Classroom Visits each year; (2) eMINTS4ALL, a two-year, 90-hour professional development program built for teachers in the grades above and below eMINTS Comp PD teachers, to support students for multiple years, including 8-9 Classroom Visits per year; and (3) Professional Development for Educational Technology Specialists (PD4ETS), a two-year program that prepares local district staff members to become eMINTS instructional specialists. In order to help eMINTS ensure a high level of program quality as it scaled up, the Education Development Center, Inc.'s Center for Children and Technology (EDC/CCT) was brought in as the external evaluator in 2006 and charged with designing an evaluation that would create instruments and procedures to assess Program Fidelity and Teacher Mastery of eMINTS core concepts, and would examine the relationships among Program Fidelity, Teacher Mastery, and student achievement. Overall, this evaluation provides evidence that the eMINTS program is being implemented with a high level of fidelity by both the eMINTS staff and participants and the graduates of the PD4ETS program; that teachers are mastering some, but not all, of the core eMINTS concepts; and that maintaining a high level of Program Fidelity is important for ensuring that teachers are mastering the core program concepts, which may then result in higher levels of student achievement. (Contains 38 tables and 10 footnotes.)