I should also have mentioned that you could tell the teachers getting involved that they don't have to commit to every night of the week. They may have other commitments or interests. If you have several teachers they could pick different nights to help out and it takes the burden off of one or two having to be there all the time. Our school requires a faculty member there while we meet at nights and the few "helper" (for lack of better term) teachers we have chose certain nights according to thier free schedule allowing the main two teachers a night off (and the ability to have a life outside of FIRST

).
I'll also say there isn't one correct answer or idea. Different schools have different regulations and different teachers have different hobbies, interests, or commitments that may collide with or influence thier amount of involvement. What works for one team may not work with another. You should listen (actually read

) all the different ideas and suggestions being presented here and decide which ones would work or are worth trying with your circumstance.