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 progra...