You might want to start with a rubber door stop and/or some other expedient for blocking entrance. The ideas above are good, basic urban survival gear. The biggest issue will be secure storage in the classroom.

Sounds like you've got a good handle on the direction you want to head. The first question I would ask is, do the class rooms already have first aid kits in them? First aid kits and first aid training for staff would be my first concern. Its far more likely a student will be injured in an accident in the classroom then a major emergency will occur. Plus that gives you a strong base to build from, I think every teacher will easily see the need for basic first aid. And its an easy expense to justify.

Then you can ramp things up. We all know mental preparedness is key number one, if the staff aren't used to thinking in a survival mindset you'll have to ease them into it. Jumping in too hard and fast my engender a lot of resistance.

+1 on the FAK. That and something to block the door (like the teacher's desk if tipped and some wedges) is where I would start. Individual class rooms are hard to do.

Making sure the dining hall has the ability to handle the students + faculty + staff + 50% (parents heading there) for three meals with water would be my next stop. That and a genny with an autostart that is run off your heating oil/gas supply.

Consider a hasp like you would lock a storage shed. Provide a rod attached with light chain to lock it. It's not pretty but is inexpensive & simple to operate and can be installed in minutes per door with little skill.

It would also be a good temporary solution until funds/time permit upgrading.

edit

Something similar to this.

Light wire similar to what is in the PSP.

I apologize for not answering your question right away Susan.

My thanks to you, UTAlumnus, for taking care of my slackness.

"...What is mechanics wire?..."

Here is a little more info. Mechanics wire is kindasorta a generic term for a wire that is easily (well, kind of) bent/twisted with the bare hands. Good for wiring all kinds of stuff together. With pliers/multitool you can really hook things up. Handy stuff to have around...

Welcome Newguy!!!

Two words to remember when you start thinking about putting locks on classroom doors:

FIRE CODES

It depends on where you are, seating capacity of the room and so forth, but local fire codes may restrict the way you can lock the door. For example, you may have to use a push open or push down handle that releases the lock.

While being able to lock the room down is a good idea, you also do not want to do anything that will prevent rapid exit from the classroom.