Additional information
Notes on contributors
Zalman Usiskin
Zalman Usiskin is a renowned mathematics educator and director of the University of Chicago School Mathematics Project, the nation's largest university-based curriculum project for K–12 mathematics, with several million students using its elementary and secondary textbooks and other materials. Usiskin's book Geometry: A Transformation Approach has greatly influenced the way geometry is taught. He received a Lifetime Achievement Award from the National Council of Teachers of Mathematics.
Kathy Hall
Kathy Hall is a statistician with Hewlett Packard's Advanced Technology Program. Before earning a PhD in statistics at Oregon State University, she worked with the National Agricultural Statistics Service. She volunteers with the Oregon Chapter of the American Statistical Association, state educational committees, and local math classes.