Florence Mihaela Singer is a full professor in the Teacher Training Department of the University of Ploiesti, Romania. Her expertise is in curriculum design and development (all grades, all subjects for pre-university education), curriculum administration, teacher training, textbook development (mathematics), Educational management, and international consultancy in education.Dr. Nerida Ellerton has two doctoral qualifications: one in theoretical and physical chemistry and one in mathematics education. She is an experienced teacher, with a specialist focus on mathematics and has taught at elementary, secondary and college levels. She was Dean of the Faculty of Education at the University of Southern Queensland for four years and is currently a full professor at Illinois State University in the Department of Mathematics.Dr. Jinfa Cai is an affiliated Full Professor in the School of Education at the University of Delaware. His primary appointment is in the Department of Mathematical Sciences. His research interests include cognitive studies of the teaching and learning of mathematics, mathematical assessment, cross-cultural studies, problem solving and teacher education.