This carefully selected Grade 2 collection is based on correlations to grade-level Common Core State Standards for mathematics. Books feature a specific mathematics concept, a problem-solving activity, and "Let's Explore Math" sidebars as well as engaging nonfiction text, supporting graphics, photographs, and key vocabulary. Titles in this 10-book collection include: The Fort (3-D Shapes); Our Trip to the City (Addition); Building a Playground (3-D Shapes); Our Harvest Lunch (Subtraction); Shapes in Art (2-D Shapes); The World of Transportation (Addition); Our Family Reunion (Subtraction); Reduce, Reuse, Recycle (Graphs); Cleaning Our School (Graphs); and Shaping Our World (2-D Shapes)