2000 – Present


UC San Diego

1989 – 1993


Purdue University

1989 – 1989

Associate Professor

Purdue University

1985 – 1985

Assistant Professor

Northern Illinois University

Selected Publications

View all publications

Reid, D.A. and Knipping, C.: Proof in mathematics education: Research, learning, and teaching
Students’ proof schemes revisited: Historical and epistemological considerations
The blocks task; comparative analyses with other proportion tasks, and qualitative reasoning skills among 7th grade children in solving the task
Classroom-based interventions in mathematics education: Relevance, significance, and applicability
DNR-based curricula: The case of complex numbers
Intellectual Need
The Kaputian program and its relation to DNR-based instruction: A common commitment to the developmnent of mathematics with meaning
The role of teachers’ knowledge of functions in their teaching: A conceptual approach with illustrations from two Cases
Deductive reasoning in mathematics education


This quarter (Winter 2019) I am teaching the following courses.