I believe the Creekside neighborhood feeds into Warren High School. You can find more information about that school here: http://www.nisd.net/warren/
In the event you're looking for a private school for your son, you can take a look at Central Catholic (http://www.cchs-satx.org/), TMI (http://tmi-sa.com/), or Antonian (http://www.antonian.org/). There are a few others as well including St. Anthony and Holy Cross.
Best of luck in your home search! Please let me know if I can be of any assistance!