D.
I would contact Debbie McNeely at Cottonwood Creek Baptist Church for a position with their Kid Care program in Allen. It's right on the border of Allen and McKinney on 121 and Stacy Rd. She will start the process of hiring for next year sometime in the next month or so. They have MDO and preschool as well as TK classes and the great thing about this place is they don't usually max out their classes with the highest possible number of students per teacher. She's a good person to work for as well. You get your kids in classes with kids their own age and pay only 1/2 price for tuition. The tuition there is the least expensive I've found. You get paid holidays as well. For part-time work it's a pretty good gig.
Since it's a faith-based school she does require the teachers be Christians.
Good luck with your search. I feel sure there's plenty of this kind of work to be found.