Peter is a co-director of the David Wheeler Institute for Research in Mathematics Education, President of the International Group for the Psychology of Mathematics Education, a senior editor for the International Journal of Science and Mathematics Education, and the coordinator of the Secondary Mathematics Master’s Program in the Faculty of Education at SFU. Peter is a former high school mathematics teacher who has kept his research interest and activities close to the classroom. He consults regularly with teachers, schools, school districts, and ministries of education on issues of teaching and learning, assessment, and numeracy.