This Fluency classroom set supports the following NCTM curriculum standards for grades 3-4: Numbers and Operations, Algebra, Geometry, Measurement, Data Analysis and Probability, and Problem Solving. It integrates math into the curriculum areas of social studies and science with nonfictin math titles. Titles included are: Civil War Recipes, Exploring Australia, and History of Space Exploration. (3 titles; 6 copies each for a total of 18 books).