The Nebraska School Activities Association (NSAA) is the organization which oversees interscholastic competition in the state of Nebraska at the high school level. The mission statement of the NSAA is:
The public and non-public high schools of Nebraska voluntarily agreed to form the Nebraska School Activities Association for the following purposes:
To formulate and make policies which will cultivate high ideals of citizenship, fair competition, sportsmanship and teamwork which will complement the member schools' curriculum programs.
To foster uniformity of standards in interscholastic activity competition .
To organize, develop, direct and regulate an interscholastic activity program which is equitable and will protect and promote the health and physical welfare of all participants.
High schools in Nebraska are assigned into classes that are determined by the size of the school's enrollment. From largest to smallest, Nebraska high school activity classes are:
AA (used only in music)
C – in certain activities, divided into:
D – in certain activities, divided into:
The number of classes used for each activity varies by the number of participating schools and by the nature of the activity; football, volleyball, basketball, plays and speech are the only activities that are divided into six classes. An additional classification, D3, was used for 6-man football until that sport was dropped from NSAA oversight after the 1998 season.
Each activity has its own standards for classification. For example, a high school may compete in Class D1 for football, Class C2 for volleyball, and Class D for track and field.