Rachel,
Every child has a reevaluation every three years. If your IEP was written to include the first three months of this school year, then you would not be having an anual IEP meeting until it was about to expire, but generally, most schools will have a meeting for the whole next year in the spring. If you did not have a spring meeting, it should be time for a meeting.
There is good news here, once a child qualifies for IDEA services, his diagnosis does not matter. He is to be served according to need, so if you see needs, then you can bring these up at the IEP meeting and ask for goals to be added in those areas. Chances are, if you see need, the school will too. The school will do some testing before an annual meeting, that will be to determine his present levels of academic performance. These may be classroom records as well, but if you were able to get any testing or evaluation named in the IEP to measure his progress, they would have to do these too. That is a good idea...you would probably need help to get these listed in his IEP if the school did not already do this on their own.
An OT should be at the meeting to discuss his progress, and will have new goals.
You may need assessment if you are asking for services and the school does not see need. This is where owning your own private educational and developmental evaluation is essential. You never want to know less than the school does about your son. I would suggest a visit to a psychiatrist who works closely with a nerupsycholgist, you can get a fairly quick evaluation that way. You will also know for sure if he has ADHD so that you can offer him all the treatment that will help him get better, and a great deal of his treatment will occur privately in cognative behaviroal therapy, private OT, speech, social skills classes, and medical intervention. The school is only required to make your son "functional" in school, and you really want so much more than that. In any case, you may need to prove that he has educational needs (grades should do this-but the school may want more) you will also want to know what kind of intervention is going to work for him, because evaluation will tell you that. Evaluation will also tell you if he made progress...
I would suggest that you log on to www.wrightslaw.com and start reading about advocacy. A good place to start is with Understanding Tests and Measurments for parents and advocates, it is an article that will explain assessment and how to understand what it means, and how to use it to your advantage to get your son what he needs. If you feel overwhelmed, find the wrightslaw yellow pages, and find an educational advocate in your area, they can guide you.
Any time that you have new assessment, or a reevaluation, they must get your consent, however, they can, and should, do cuiriculum based evaluation to determine his present levels of performance before your meeting, and they do not need your consent for that.
Finally, you should not call and ask for anything regaurding the IEP. Write, always write, or it never happened.
M.