Founding Teachers

Kate Abell has been the facilitator of the Math Collective for the past nine years, most recently supporting work in the Brooklyn North and Manhattan Field Support Centers. Prior to her work with the Math Collective, she was a Region 9 math coach in the South Bronx for 4 years, and taught 4th and 5th graders for 11 years in the NYC public schools. 

Peter Cipparone taught 4th grade at PS 161 and PS 29 for four years.  He is currently a doctoral student in Teaching and Teacher Education at the University of Michigan, where he teaches courses in the university's elementary teacher education program. He is also a research assistant for TeachingWorks, an organization working to raise the quality of beginning teaching in the U.S. 

Kim Van Duzer has taught 2nd, 3rd, 4th and 5th grades in the New York City public schools for the past 16 years.  Working closely with the Math Collective, Kim has participated in lesson studies, designed curriculum, modeled lessons and led her colleagues in implementing inquiry-based, student-centered methods of teaching mathematics.

Research and Evaluation

Hanna Haydar is the head of the Childhood Mathematics Education Program at the City University of New York-Brooklyn College, where he also teaches graduate mathematics education method and research courses. He was previously the Curriculum Standards and Professional Development adviser at RAND Education and the Supreme Education Council in Doha- Qatar. Hanna received his PhD in Mathematics Education from Teachers College-Columbia University. His research interests and publications focus on educational policy, beginning mathematics teachers, inclusion, lesson study and teachers' response to mathematical errors.