The University of Mississippi, with funding provided by Texas Instruments, completed a study on the effects of the TI-Navigator System on student achievement and attitude, in algebra II. Students (n = 386) were divided into control and experimental groups in two sites. In a quasi-experimental design, the control group used TI calculators as appropriate for lessons while the experimental group used TI calculators and the Navigator System in the same lessons. Using a pre-posttest design, students in both groups completed an attitudinal survey and a content test designed to focus on algebraic concepts and skills with specific attention to functions, graphing, systems of equations, and concept of variable. Findings from the study indicated that both groups showed improvement in their content but the experimental group gains were statistically significant at the
p < .007 level. Attitudes were not significantly affected between the two groups.