Brainstorm with Me?

I made it to the second round of the NYC Midnight Short Story Challenge of 2012. My heat has been given:

Genre: drama
Subject: a laboratory
Character: a teacher

We have until noon Sunday to write a story (word limit: 1,500) using that prompt. The character has to be a prominent part of the action, and it has to demonstrate the genre clearly and effectively.

So, any ideas?