Edward Conley, May I suggest that you get a recent copy of Sky and Telescope or Astronomy and look in the back pages for a Coating firm near you. I am assuming that you do have these excellent magazines available for reading as they will give the students a lot of excellent ideas on astronomy. I can't recommend any particular supplier as one is generally as good as the next for what you and I need. Get the one near you so you can bang them on the head (figurativly, of course) if they mess up. You may also look around on the net for one near you. Have Fun and Keep Looking Up! Bob May