I don't know how it is in every state, but in this one only some of the schools do RTI (ours does not). Some schools require an RTI process before they would make a student eligible for an IEP (at least with some disabilities, like learning disabilities). They plan interventions, track progress, and then only write an IEP if the student does not improve X amount.

Did you have a meeting yet and did they say anything about an IEP?

And what medication do you have him on? I tried a trial without guanfacine and am seeing what I think is a deterioration. I want to give it a couple more days then add it back in. That's wonderful that you aren't having any med problems or side effects from meds!