R.
Did you know that PISD has three preschools? My son went to Beaty Early Childhood School for two years. It's about 250$/month for a 1/2 day five days per week and it is AWESOME! No naps, and obviously it's education based as all the teachers are certified and the curriculum is based on PISD and prepares kids for Kindergarten. I LOVE LOVE LOVE their program! www.pisd.edu
Let me know if I can be of further help!
R.