The Middle Childhood through Early Adolescence/Mathematics Standards Committee recommends twelve standards for National Board Certification in each of these two fields. The standards have been sequenced to facilitate understanding, not to assign priorities. In fact, in the course of quality mathematics teaching, accomplished teachers often demonstrate several of these standards concurrently as they skillfully weave their knowledge, skills, and dispositions into a rich tapestry of accomplished practice.
National Board Certification - Mathematics - Early Adolescence Website