My son is younger than yours, he's 8, and he has an autism diagnosis. I think one thing to think of is what type of therapy could be helpful to him. For us, my son was diagnosed at age 5, and has been doing ABA therapy. Right now, they're working through this book called 100 Social Rules for Kids. It's mainly for kids in middle school I think. But the therapist works on these social rules, and they work on practicing them. For me, I'm glad that he has the diagnosis, because ABA therapy is covered under our Kaiser insurance. For an older kid, I'm not sure what type of therapy is helpful. Did the psychologist recommend any further testing? Is that something that you want to pursue?
