All student who wish to play sports in college should register with the NCAA Eligibility Center. Go to www.eligibilitycenter.org. In order to be eilgible to participate in and/or to receive scholarship money from Division 1 or Division 2 sports programs, you must meet NCAA eligibility requirements. You can find these requirements on the website linked above. When you take the SAT or ACT, indicate that you would like to send your scores to the NCAA Eligibility Center. Its code number is 9999.
In addition to meeting NCAA requirements, you will also need to meet the individual schools' entrance requirements for incoming freshmen.