Mark Driscoll is the author of Fostering Geometric Thinking (2007) and Fostering Algebraic Thinking (1999) and their professional development companions,The Fostering Geometric Thinking Toolkit (2008) and The Fostering Algebraic Thinking Toolkit (2001)-all published by Heinemann. Through Heinemann Professional Development he presents further PD related to math teaching and learning. Mark is Codirector of the Center for Leadership and Learning Communities at Educational Development Center, Inc., where he has directed a range of teacher enhancement, leadership, and materials-development programs. He received his Ph.D. in mathematics (differential geometry) from Washington University in St. Louis and taught mathematics at Logos School, an alternative high school in inner-city St. Louis. He has been a member of the writing team for NCTM's Assessment Standards for School Mathematics and served as Editor of Mathematics Education Leadership, the journal of the National Council of Supervisors of Mathematics, from 2003-2007. Mark has been named the recipient of the Ross Taylor/Glenn Gilbert National Leadership Award from the National Council of Supervisors of Mathematics (NCSM). The award recognizes Mark's contributions to mathematics education over four decades as well as his work at Education Development Center, Inc. (EDC). He is the coauthor of Fostering Geometric Thinking and its accompanying toolkit, and author of Fostering Algebraic Thinking, the book Mathematics Teacher called "an important tool in our collective effort to improve the quality of mathematics instruction."