The first IEP is always the hardest. You don't know what to expect, you're worried about your child, and you're entering unfamiliar territory. Don't worry, it gets easier. Maybe easier isn't the right word - it becomes more "familiar."
I'm not sure why so many parents agree to having an IEP in the Spring. Do yourself a favor and schedule it for early in the school year. October is probably the best time because it gives everybody a month to settle in and get to know each other.
It also allows you to begin with fresh IEP Goals and Objectives and an entire year to follow the progress set forth in the IEP. Always remember, you can call for an IEP Meeting at any time. If things aren't going well they may need to be tweaked.
If you're not sure what to expect or why your child even needs an IEP, here are some of my favorite Learning Disability Must-Haves. These will help you understand what it's like to have a learning disability and some strategies to help your child.
To help navigate the IEP process, here are some great Tools for an Easy IEP. Many IEP resources contain roughly the same information so look for something that suits your style and needs.
Most of all - Best of Luck with your IEP!