In Grade 6, instructional time should focus on four critical areas: (1) connecting ratio and rate to whole number multiplication and division and using concepts of ratio and rate to solve problems; (2) completing understanding of division of fractions and extending the notion of number to the system of rational numbers, which includes negative numbers; (3) writing, interpreting, and using expressions and equations; and (4) developing understanding of statistical thinking.

https://vimeo.com/110807219?outro=1

https://www.washingtonpost.com/news/answer-sheet/wp/2016/01/15/are-the-common-core-math-standards-being-misinterpreted/?postshare=651453218208510&tid=ss_mail