It is a very intimidating experence the first time at an IEP meeting, but there is nothing to fear. First and foremost, know what the process is, and understand that the school has to move through the paperwork in a specific order. You can learn about this at www.wrightslaw.com.
Each thing they tell you or point out on the forms is filling a specific purpose to meet the procedural requirements of IDEA and IL state laws, so let them say what they need to say, and ask questions when you have them. If you have a specific question, ask when the right time to ask would be, and this may help you and the team to get the job done. You have a lot more at stake than the rest of the team does, and it is hard for them to remember that, but they have a job to get done.
At the first meeting, you will go over the evaluation data, and will need to reach an agreement about how he will be served, under what category, and you will have a chance to agree or disagree with the school evaluation. It is your right to request an independent evaluation if you disagree, but know that this will delay services for initial evaluations.
After you have been informed of the evaluation, if he qualifies for services, they will go over the IEP step by step. You will have input, and at the begining of the IEP, there will be a statement about what you want for your son. You should include that you want a program that will maximize his educational potential. I say that because this coveres you legally, and if you settle for less than this in your statement, you are limiting your own input. It may seem like a small thing, but it is not. You want to shoot for the moon on this statement, you are in no way entitled to this, but if you let the school write something specific and limiting here, they can say that you had input, and they did what you wanted. Always make this statement if they will let you.
They will go through each page of the IEP, and when they get to the end, they will ask you to sign the IEP. You will need to give consent for this first IEP to go into effect, it is the only time that your full consent is required to start services. Read about initial IEP's and consent on wrightslaw so that you understand it. You do have the right to disagree, but on an initial IEP it is tricky.
Learn what "measurable" really means on wrightslaw, and learn about evaluation data so you understand it fully by reading "Understanding Tests and Measurments for Parents and Advocates." Read this as many times as you need to so that you understand what the evaluators tell you at the meeting. It will be very helpful. You will need to fully understand how they are going to measure his progress, and where he is starting from.
There will be some differences between early intervention and an IEP. Much of what he is offered is dependent on his evaluation, and if he has a diagnosis that qualifiys him for special education, or if he has a need for the instructional service of speech and langague therapy; there is a difference.
Some children will recieve speech and langague therapy through the school as an instructional service without having a full educational program and will be "Speech Only" students. This can be done without a broad category of a disablity, of which there are 13 qualifiying categories. If he has a qualifying diagnosis under IDEA and he needs special education to be functional, he will qualify for special educaiton, and many schools will have preschool programs for children with disabilities or will provide a preschool program that is supported by special education and related services. Occupational therapy is a related service to special education. It is unlikely that he will recieve OT unless his is in a special education program. Sensory integration Disorder is not usually recognized by schools as a diagnosis that will qualify children under any of the categories. Some schools may recognize that children need services, and may find a way to qualify the child, and if that is the case, do not be concered about the way the school wants to qualify your child at this age, listen to the program they offer and see if that is what you think is good for your son.
If you are only offered speech, you may have to pick up OT through private therapy, and you should be exploring this avenue anyway, as public services are only required to make your child functional, and you will always want more than that for your son.
If you feel like you cannot do it alone, contact an advocate and find a support group in your area. Wrightslaw has a yellow pages on it's site for each state, and you can find help if you need it.
Remember, you are a part of the process and the team, learn where you fit and try to always keep the relationship you have with the school on good terms. Let them do what they need to do, and they will be more likely to work with you too!
M.