After seeing pictures of all the desks, etc. piled up against the doors at OSU after being told to shelter in place, every room that has a door with a “closer arm” should have one of these ....”The Sleeve”:
http://wqad.com/2014/06/10/muscatine-teachers-invention-could-save-your-childs-life/
I’m tempted to buy one for a first-year teacher who may soon become a member of the family, if the classroom doors at her school have closer arms. If not, the “Rampart” would be the next best thing to have on hand.
https://fightingchancesolutions.com/
How about grabbing The Sleeve and hiding just behind the door... and when shooter enters, conk him over the head with it?!?
The Baseball Bat could also help here...
I made my own “rampart” door blocks by cutting a 3 1/2 inch wide by 41 inch long board, cutting a notch in the top end and nailing a piece of inner tube to the bottom.
Stick the top under the door knob, kick the bottom in and it makes a great door brace. Everyone in the family wants two or three!