K.M.
How frustrating!!! Are they following his IEP? Are you having a hard time getting things added to his IEP?
I don't think private school is the better option. Most private schools do not have the services your son needs. They usually don't have the funding to provide OT, PT, speech, etc. My sons go to a private school and they have one lady that just does a little speech therapy and reading help. I'm not sure if she's even full time.
I don't know anything about the Plano ISD, but it sounds like you're a terrific advocate for him!!! Keep it up!!