Thanks for sharing that. I'm going to print that and give it to my Mother and ask her what she thinks.
Obviously, not all of that will apply to her classroom, for instance her door swings inward and she only has one window, but the rest of your advice is superb!
NRA Life Member
Ladyfriend: "I need help with the leaves in the yard"
Me: "Controlled burn?"
LadyFriend: "I forgot my Boy Scout turned into an infantry officer."