Mark W. Ellis is an Assistant Professor in the Department of
Secondary Education at
José N. Contreras is an Associate Professor in the Department of Mathematics at The University of Southern Mississippi where he teaches mathematics courses for both elementary and secondary mathematics prospective teachers. He is interested in integrating problem posing, problem solving, conjecture making, technology, and realistic mathematics education in teaching and teacher education.
Armando
M. Martínez-Cruz is a Professor in the Department of
Mathematics at