With Common Core’s Eureka Math, students in grades 6 through 8 continue to study rational numbers, building fluency with fraction operations and expanding their scope to include both positive and negative numbers. They develop an understanding of and fluency with concepts of ratio, rate, and proportion. Students apply their understanding of rational number relationships to write, evaluate, and solve expressions and equations, and use equations to model real-world data in a variety of ways. They relate algebraic principles to geometric concepts and continue to build their understanding of 3-dimensional figures. Students build a foundation for further study of probability and data analysis as they study concepts related to populations and samples.