How to Use a Carabiner to Lock Out an Intruder

Recently, I watched a video on how to tie a belt around the hinge of a door to stop an intruder. At school, we are always thinking of ways to keep our students safe, so I took a belt to school to see if this would work on our doors. It did, but as a teacher who usually wears a dress to school it wasn't practical.  

Later that day, I discussed this with our P.E. teacher and we started brainstorming other things we could use that would work in a similar fashion. 

He hangs his key ring on a nail with a carabiner. Inspiration hit us at the same time! Slide the carabiner over it!

How to Use a Carabiner to Lock Out an Intruder

Most teachers wear some type of lanyard to display their identification badges and hold their keys, so what if we attached one to our lanyards? 

What do you think? Would this work? Do you have any other ideas to keep our students safe?

Thanks for reading,

Karen