Ken Johnson is a professor of mathmatics at Sierra College.
Ted Herr teaches mathematics at Roseville High School in Roseville, California. He earned his undergraduate degree at the University of California at Los Angeles, his teaching credential at University of California at Irvine, and his master's degree at California State University at Sacramento.
Judy Kysh is an expert on the preparation of middle and high school math teachers. She also works with Bay Area teachers to improve the teaching and learning of mathematics from kindergarten to college.