The past few decades have seen incredible growth in the study of teaching and learning mathematics. Schoolteachers, university professors, and other educators have produced standards documents, research reports, and curriculum frameworks with the potential to help improve students’ learning. All of this activity makes it an exciting time to enter the profession of mathematics teaching. However, it can also be overwhelming to try to digest and reflect on everything the field has to offer. In fact, one is never really done learning about teaching mathematics.