Acknowledgements

Dr. Daniel Chazan

Dr. Daniel Chazan (University of Maryland, College Park [UMCP], Mathematics Education), is the Director of the Center for Mathematics Education at UMCP. Chazan's research interests include the potential of history and philosophy of mathematics and mathematics teaching as a social endeavor. He also served at the PI on the Case Studies of Urban Algebra 1 teachers. 

The Center for Mathematics Education does research on the teaching of mathematics in local urban schools, prepares teachers for elementary and secondary schools at both the undergraduate and postgraduate levels, educates researchers and teacher educators, and does outreach to schools. 

Chazan's professional interests include: student-centered mathematics teaching, the potential of history and philosophy of mathematics for informing such teaching, the role of technology in supporting student classroom exploration, exploring possibilities for constructive links between educational scholarship and practice, and the preparation of future teachers. 

Together with Patricio Herbst of the University of Michigan, with the Thought Experiments in Mathematics Education (ThEMaT) project, he has developed a set of animations representing algebra teaching and materials available through the LessonSketch.org platform.