(AP) — A study says Nebraska’s math standards cover most of the national Common Core content but sometimes in later grades.

The study was paid for by the Nebraska Education Department and was released Thursday. It says the Common Core standards include higher math concepts that Nebraska’s standards don’t include. The state standards do not go beyond those taught in high school advanced algebra classes.

The department ordered the study to see how well Nebraska’s standards align with the Common Core, a set of voluntary national standards adopted by all but four states, including Nebraska.

Nebraska education board President Pat Timm says that although the more advanced math concepts aren’t included in the standards, many of the state’s students still take those classes.