For students, becoming mathematical thinkers and problem solvers is an essential first step to achieving STEM success. In this brief but thought-provoking look at mathematics teaching, former NCTM president Cathy L. Seeley considers what it takes for each teacher to help every student become a mathematical thinker and problem solver. Seeley, a highly regarded author and experienced math educator, explains her approach while she skillfully accomplishes the following: Challenges old ideas about teaching math Offers a compelling rationale to focus on mathematical thinking and problem solving Emphasizes the importance of a growth mindset about mathematical ability and achievement for students and teachers alike Highlights the potential of professional learning communities as powerful tools for learning how to be more effective in helping students gain the mathematical knowledge, problem-solving skills, and habits of mind they need for living and working in the 21st century .