Lil i'm sorry you're having to go through this. Someone undercutting you with students can be a big pain in the ass.

One of my girlfriends at work and i have a running gag.

She rearranged the contents of all my file cabinets.

I changed the locks on her classroom door.

She turned every desk in my room upside down.

So I removed every flourescent lightbulb from her room.

It's been quite fun, really, but the paybacks are going to be a bitch.