This article examines how laptop computing technology, teacher professional development, and systematic support resulted in changed teaching practices and increased student achievement in 47 K-12 schools in 11 Florida school districts. The overview of a large-scale study documents the type and magnitude of change in student-centered teaching, technology tool-based teaching, and student learning that were observed in 440 classrooms over the course of a school year. By employing multiple observations in all schools, document analysis, interviews, and teacher inquiry, an account of the conditions, processes, and consequences (Hall, 1995) of laptop computing was generated. Based on the analysis of data, laptop computing had a positive impact across districts, particularly in regard to changes in teaching practices. Increases in student achievement were also demonstrated across districts. This study calls attention to systemic issues associated with successful laptop implementation and provides implications for statewide laptop programs. (Contains 4 figures and 2 tables.)