I would be happy to help you find a place. I have worked with people that work in Kenedy before. What kind of private school are you looking for? I would need to know how many bedroom's, baths, and any special features you will want or need, also I would need to know your price range, and how long of a lease you want.
Take a look at the school maps near Schertz: http://www.trulia.com/real_estate/Schertz-Texas/schools/
Once you decide on an area, I would recommend that you work with an agent, here is a directory of agents in the area: http://www.trulia.com/voices/directory/Schertz-agent--33436
I hope this helps!
Ali, Community manager