Most states have adopted the Common Core Standards (CCS) or will be adopting them in the next few years. One key feature of the CCS is the Standards for Mathematical Practice, which describe the expertise K–12 mathematics teachers should develop in their students: Click here to read more...
Information taken from the following website: http://www.amle.org/Publications/MiddleLevelInsider/Articles/Math/tabid/2527/Default.aspx
