STANDARDS FOR MATHEMATICAL PRACTICE: What do they look like in action at each grade level?

The Common Core State Standards for Mathematics include both content standards and Standards for Mathematical Practice. The latter are sometimes referred to as the students’ job targets. But what do these practices look like as students matriculate through the K-12 system? How does “reason abstractly and quantitatively” look different between elementary and middle school levels?  Math leaders in Washington State, Arizona, and other states in the country have been asking these same questions of themselves. The resources they have drafted provides insights to these questions as well as other questions about what the Standards for Mathematical Practice look like at each grade level.