Angelia, I know how you feel. I was there once myself. I have used crutches, splints, neck braces and now a walker for over 20 years. Several years ago a neck surgery cut the nerve to my Rt Vocal Cord. This had a big impact on my speech. For my physical appearance I've said "I had an accident", "was in a bar fight", "fell down stairs", "arthritis". depending on the person asking. You get the idea. My neck on the Rt has so many scars, from 5 fusions and now 2 cancer surgeries I'm thinking of using,
"its my make-up for a "Horror Skit", looks real huh". With little kids I just explain very simply.

My speech could be difficult to understand to some people. My cancer surgery has made it harder yet. Especially over the phone. You didn't say how old the kids are that you teach. I tell all ages that I
had an operation and it is difficult to speak. To tell me if they don't understand a word or words. I do try to speak slower and concentrate on pronouncing as clearly as possible. I practice in front of the bathroom mirror. Kids pickup what you're trying to say faster than adults. As a teacher you have a blackboard to go to if all else fails. Have you let the kids know why your speech has changed? This would be a good teaching opportunity. I know it may make you uncomfortable. It's ok to feel down for awhile as long as you are working at making things better. Venting here is good. Good luck.