Anchor standards have been identified for each domain. There are forty-one anchor standards under the six domains. The anchor standards describe the fundamental foundation of knowledge and skill in each area. Each anchor standard has been further broken down into duo-grade level standards appropriate for the age and developmental level of students. A set of forty-one standards has also been created for each duo-grade level. Duo-grade levels are as follows: prekindergarten and kindergarten (P–K); grades 1 and 2 (1–2); grades 3 and 4 (3–4); grades 5 and 6 (5–6); grades 7 and 8 (7–8).