Lucky You!!! I wish I could bring one of mine with me to the office each day.
I'd be sure to take her out for a good long walk early in the morning so that she'd have some of her energy worked out and be more inclined to rest/sleep during class. Wee-Wee pads are a good idea if outside isn't readily available. And some water.
Good luck, and let us know how it goes that first day.