All communication should be in writing, and you should keep a copy of every document you submit. Keep brief notes of important telephone conversations. Keep a written record of all verbal agreements, and give a copy to the school district. Hand deliver important documents directly, or use certified mail and keep the return receipt. Keep a diary noting the dates you submitted documents.
Some regulations require that the district comply with time requirements.
For example, they may have 30 days to respond to a written request. If so, you need to know the date you made the request. Legally speaking, if it is not in writing, it never happened. Document all of your child's unaddressed needs. A parent's insistence that a child requires a specific service is never sufficient.