Hi Grant and welcome to ICEINSPACE. You photo looks fantastic. Isn't it amazing what a 30 second shot can turn out when imaging the sky. This is a great website to learn heaps about a broad range of topics. See if the school can come up with the money to get an imaging set up as the kids and parents love it. Any help needed just email me or send me a private message by clicking on my name. Have fun teaching this year as you should with the timetable you have.