BHTeach welcome! I think you'll have a lot to talk about with Kiko (Karen)...she's a teacher also, and mother of one and one on the way.

She doesn't get a chance to check in much when she's teaching, but she's a doll and a great resource.
I know it's hard to chug water when you don't get much chance for potty breaks, but that's a great thing to do in class. Let all the other teachers know that you are doing SBD, and fill them in on what you can eat and what you can't, so they can help you stay on track. Avoid the lunch room spreads if you can...eat in your room with friends when you know there's a spread in there! Let your kids know that you're doing SBD, and can't eat candy. Don't eat what they give you! Don't give in to those temptations, and you'll do fine!
Some ways to deal with the sweet cravings: SF hard candy, SF Jell-o, No Sugar Added Creamsicles, No Sugar Added Fudgesicles (mix a slightly melted fudgesicle with 2 Tbsp of natural PB and 2 Tbsp of Cool Whip Free for a decadent PB cup dessert...

), make coleslaw (there's a recipe for the overnight coleslaw in the forums) or 3 bean salad.
You can do this...after 3 to 5 days, you'll find the cravings are gone!!!