Rick Billstein is a Professor of Mathematics at the University of Montana. He has worked in mathematics teacher education at this university for 40 years and his current research is in the areas of curriculum development and mathematics teacher education. He teaches courses for future teachers in the Mathematics Department and also is the site director for the "Show-Me Project," an NSF-funded project supporting the dissemination and implementation of standards-based middle grades mathematics curricula. He worked on an NSF grant called "Tinker Plots" to develop new data analysis software and he...