Book excerpt: "Eureka Math is a comprehensive, content-rich PreK-12 curriculum that follows the focus and coherence of the Common Core State Standards in Mathematics (CCSSM) and carefully sequences the mathematical progressions into expertly crafted instructional modules. The companion Study Guides to Eureka Math gather the key components of the curriculum for each grade into a single location, unpacking the standards in detail so that both users and non-users of Eureka Math can benefit equally from the content presented. The Eureka Math Curriculum Study Guide, Grade PK provides an overview of all of the Pre-Kindergarten modules, including Counting to 5; Shapes; Counting to 10; Comparison of Length, Weight, Capacity, and Numbers to 5; and Addition and Subtraction Stories and Counting to 20" --