Build a foundation and focus on what matters most for math readiness with Math 4 Today: The Common Core Edition for fourth grade. This 96-page comprehensive supplement contains standards-aligned reproducible activities designed to focus on critical math skills and concepts that meet the Common Core State Standards. Each page includes 16 problems to be completed during a four-day period. The exercises are arranged in a continuous spiral so that concepts are repeated weekly. An assessment for the fifth day is provided for evaluating students´ understanding of the math concepts practiced throughout the week. Also included are a Common Core State Standards alignment matrix and an answer key.