NAIA Eligibility is a bit more simple to determine. In order to be eligible, students must graduate from high school and meet two out of three of these requirements: 

Achieve a minimum overall high school GPA of 2.0 or higher.

Graduate in the top half of your high school class. (Ex: If a studen't class ranking were 150/300, he or she would meet this standard. If the ranking were 151/300, this requirement would not be met.)

Achieve the NAIA minimum test score requirement and send your scores from the testing company.