One lost math teacher

[charlieeppes.livejournal.com]

Charlie looked up, down, north, south, east and west and came to a conclusion. "Yup. I'm lost," he nodded to himself. He'd wandered along down the corridors, hanging up the maths sign up sheet at random, assuming that he'd reach somewhere, at some point, that would give him a clue as to where he was supposed to be. No luck so far.

And now he was stuck at a crossroads. Where to go, where to go..?