Elementary school aged kids love their teachers. Just relax and have fun. They will respond in return. Your experiences as a child will provide you the empathy needed to understand those children that are also subjected to harassment, and it will be a powerful thing for you to "confront" (within reason) any bullying issues that you see in your class. I think you might find that this experience turns into one that will help in your own healing. Go get 'em, Mr. Skipper!