This article evaluates the impact of laptop computing in K-12 classrooms across 11 school districts in Florida, revealing that such technology along with teacher professional development leads to significant changes in teaching practices and increases in student achievement. The study utilized observations, interviews, and document analysis to assess the conditions, processes, and consequences associated with laptop implementation. The findings suggest that the successful integration of laptops fosters a more student-centered learning environment, although results on overall academic performance are mixed.