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PROBLEM SOLVING WITH MATH MODELS is an educational tool to help teach the new Common Core State Standards. This series specifically focuses on Mathematical Practice 1 (Problem Solving) and Mathematical Practice 4 (Modeling). The kindergarten and first grade books are designed to help children gain familiarity with concrete, pictorial, and abstract representations. This is done by focusing on using number frames with concrete materials(concrete), pictures (pictorial), and number lines (abstract). Each book in the series is framed around the designated Common Core State Standards for the grade. Each section begins with a small number range and increases as the book builds.