V.M.
J.,
I'm assuming you're in AISD since the teacher recommended Kooken. My son currently attends the autistic program at Kooken and I have nothing but awesome things to say about the school and faculty.
I'm not sure if calling Kooken would be the best route to go, though. It seems as though there is a process the teacher needs to follow. I would talk more with the teacher about what the process is to have her evaluated and if she doesn't know, then go to an administrator or counselor.
There's no harm in having her evaluated and if it turns out she needs therapy, then be thankful you have the opportunity to get it early!
Cook Childrens also has a great speech department, but of course, this would cost!
Good luck!
V.