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Janet Andreasen, PhD, is a mathematics specialist at The Geneva School in Casselberry, Florida. She has also worked in higher education for more than 17 years and has experience working with both practicing and prospective mathematics teachers at all levels.

Guy Barmoha is director of the Department of the Mathematics, Science, & Gifted Department at Broward County Public Schools, Florida. Previously, he was an elementary mathematics curriculum supervisor.

George J. Roy, PhD, is an associate professor of mathematics education at the University of South Carolina. He teaches mathematics methods courses in the Department of Instruction and Teacher Education.

Erhan Selcuk Haciomeroglu, PhD, is an associate professor of mathematics education at the University of Central Florida. His research focuses on the conceptual understanding of calculus and technology integration in teaching.

Edward C. Nolan is currently an assistant professor of education at Moravian University in Bethlehem, Pennsylvania, teaching courses to understand the middle level learner; mathematics methods courses for early childhood, middle level, and secondary mathematics; and supporting field placements in education across the grades.

Craig Cullen, PhD, is an associate professor of mathematics education at Illinois State University. He works with preservice secondary mathematics teachers, regularly teaching methods courses and supervising student teachers.

Brian Dean, a former teacher, is senior instructional specialist in secondary mathematics for the District School Board of Pasco County, Florida, where he leads mathematics teaching and learning.

Amanda Miller, PhD, is an assistant professor at Illinois State University, where she teaches mathematics content and methods courses to undergraduate elementary- and middle-school-education majors.