These two documents provide step by step directions on how to backup and restore your course. It is advisable to periodically backup your course in case anything should happen to your working copy.
Reset Your Course - Use this feature if you plan on using your course again. Using reset allows you to empty a course of user data, while retaining the activities and other settings.
Moving Your Course - If you are moving to a new school in the district your course can be moved there in Moodle easily without you having to back it up and restore it. Please submit a 360 request to have that done.
Moodle User Guide - This is a PDF version of the book "Using Moodle, Teaching with the Popular open Source Course Managment System" by Jason Cole and Helen Foster. This document is 6mb and depending on your Internet access speed could take some time to download.
Moodle User Support Site - Moodle.org is the community site where Moodle is made and discussed. Anyone can register as a user and join forums and discussions. There is also a knowledge base available and support from developers.