Simply replace the unfilled areas such as "" and "[date]" with your information.
Dear [School Name] Parents,
It is time again for our [interval] [event name]. Every [interval], we hold this event in order to [reason for event]. It has become an event that our students and faculty look forward to every year. In order to make the event a success, we have established certain guidelines. These help us to ensure that everyone has an enjoyable experience.
Enclosed, is a packet with the event information and itinerary. This should have all of the necessary planning information you and your child need. Should you have any additional questions, your child's [class] teacher should be able to assist you. You can also contact my office at [contact information].