In SA, there are guidelines and qualifications that need to be met, before registering your child for Pre-K or even Kinder in a public school. May be different for private schools, not sure.
For your son to qualify for Pre-K, he needs to speak only Spanish, have one parent or both in the military, or come from a low income home.
To qualify for Kinder, he needs to turn 5 on or before Sept. 1st. If not, he can start kinder next school year, 2010-2011.
Sounds like he will be attending a Northside I.S.D. school, which is a public school.
Feel free to call the Northside I.S.D. main office @ ###-###-####. Explain to them, you are new to the area and would like a list of schools in your attendance area. Just give them your zip code.
For a listing of private schools, you can call 311 and ask for assistance. This is our information number.
Good Luck!
P.S. Welcome to San Antonio!