This easy-to-use classroom resource provides a series of lessons, templates, and exemplars for practical classroom application, and will help teachers understand the content standards and the mathematical practice standards in order to develop meaningful mathematics lessons. This book primarily focuses on teachers' procedural knowledge of standards implementation as they apply the information and resources presented in this book. Mathematical rigor in the classroom for students includes lessons that target conceptual knowledge, procedural knowledge, factual knowledge, meta-cognitive knowledge, and the application of this knowledge in context. It also includes opportunities for teachers to develop all three dimensions of rigor as it applies to the Common Core.