This study provides a comprehensive look at a constructivist one-to-one computing program's effects on teaching and learning practices as well as student learning achievements. The study participants were 476 fourth and fifth grade students and their teachers from four elementary schools from a school district in the Dallas, Texas, area. Findings indicated consistent and highly positive findings of the efficacy of a constructivist one-to-one computing program in terms of student math and reading achievement, differentiation in teaching and learning, higher student attendance, and decreased disciplinary actions, suggesting a range of possible educational benefits that can be achieved through a comprehensive one-to-one computing educational environment. (Contains 3 tables.)