NCAA
Do You Want to Compete at an NCAA School? Make the appropriate Eligibility Center account for you!
You must register with the NCAA Eligibility Center if you want to play in NCAA sports. Before beginning your freshman year of high school, make a plan to register (or year nine of secondary school). You can use the information below to assist you while you complete the registration process. Also, information about college sport can be found at the NCAA website.
Review the three account options before choosing the one that's best for you to get started. Only one account will need to be made with the Eligibility Center. The ideal course of action is to start with the free Profile Page so that you can subsequently switch to the Certification account required for your situation.
https://web3.ncaa.org/ecwr3/
NAIA
NAIA is another organization similar to NCAA. NAIA consist of small schools such as Saint Xavier, Bethel College, Indiana University Northwest, Holy Cross College, etc.. The program consists of various sports and 250 colleges all over the United State. The NAIA is the only sports body that promotes student-athlete enrollment and financial sustainability while hosting national championships on behalf of small universities.
By using straightforward and standardized formulas to optimize the financial performance of their athletic departments, NAIA member institutions' top priorities of enrollment, student achievement, and financial viability are supported by the concept of Return On Athletics (ROA).
http://www.naia.org/