NCAA
The National Collegiate Athletic Association is to serve the student/athlete.
If you are planning on playing a sport at a Division I or II college or university, you will need to register with the NCAA.
Go to their website to find out more information and to register.
NCAA Eligibility Center (Website to register with the NCAA Eligibility Center)
NCAA - 2point3.org (Information on the initial-eligibility process for NCAA athletics in college)
NCAA booklet that explains requirements to be eligible to participate in college athletics in the NCAA http://fs.ncaa.org/Docs/eligibility_center/Student_Resources/CBSA.pdf