Follow Up and Follow Through!
If you create a list of volunteers in the first few weeks of school, get the list out to the committee chairs and make sure they follow up with the volunteers via email… even if the volunteers signed up for an event in the Spring.
Communication is so important. Think back to when you were new to a school and you just wanted to find a place to fit in. If you had communication with parents who were involved and running committees, it may have been easier to find your way.
If you wait until the Spring, the volunteer may have forgotten or lost interest. Connect with the volunteers and help them help you!