Aligned to Common Core! This Mastering Math book is a complete, condensed course of instruction or review for Third Grade Mathematics. Each Mastering Math book is organized according to these five general curriculum threads: Number Sense & Numeration, Measurement, Geometry & Spatial Sense, Patterning & Algebra, and Data Management & Probability. Each topic area contains individual skills and concepts that match the learning expectations of the curriculum. Mastering Math can be used to support the standard classroom curriculum as every learning expectation in the year's curriculum is included. Mastering Math is also an excellent framework for reviewing the full curriculum at home for students who need extra practice.