I was actually curious what the requirements to be a school nurse were, because I didn't know. I assumed that extensive training was required, but I'm always prepared to be surprised by how wrong my seemingly reasonable assumptions are (especially in cases in which there's a limited budget in play).
I found a few different requirements for different places claimed, but they all involved significant experience and training, which made me happy. It was not a cafeteria worker posing as a nurse ala season 4 of The Simpsons situation.
Anyway, that's the origin of the school nurse who wants everyone to know just how experienced and well trained she is, which was most definitely the only thing people must have been wondering about after reading this page for the first time.