Catherine Twomey Fosnot is the Founding Director of Mathematics in the City and former Professor of Education at The City College of the City of New York. She has twice received the "best writing" award from AERA's Constructivist SIG and she was the recipient of the "young scholar" award by Educational Communication and Technology Journal. She is the lead author of the Contexts for Learning Mathematics series as well as the Young Mathematicians at Work series.
Antonia Cameron is a Master Coach for K-6 Mathematics at Metamorphosis. Former co-director of Mathematics in the City, a national center for professional development at The City College of New York, Toni is coauthor of numerous facilitator guides and Contexts for Learning unit books. She is a nationally known mathematics "coaching coach" and speaker on professional development practices.