Coherence
Coherence: think across grades, and link to major topics within grades
The Common Core State Standards: Mathematics are designed around coherent progressions from grade to grade. Learning is carefully connected across grades so that students can build new understanding onto foundations built in previous years. Each standard is not a new event, but an extension of previous learning. Thinking across grades: The Standards are designed around coherent progressions from grade to grade. Learning is carefully connected across grades so that students can build new understanding onto foundations built in previous years. Each standard is not a new event, but an extension of previous learning. Linking to major topics: Instead of allowing additional or supporting topics to detract from the focus of the grade, these concepts serve the grade level focus. For example, instead of data displays as an end in themselves, they are an opportunity to do gradelevel word problems.  from achievethecore.org 
The big shifts that the Common Core State Standards: Mathematics bring are increased focus, coherence, and rigor as the guiding principles for mathematics instruction and learning.
Coherence in the SFUSD CurriculumExamples of coherence in the SFUSD Curriculum:
