If she didn't want challenge to whatever she said she should not have said it...

Entitled to her choice, so are those that chose otherwise and will defend it as strongly as she obviously felt her need to do so.....

Or give her a tissue and a crying room for the day......

As for saying God bless those saying it are guaranteed that right under the first amendment... As a teacher she should know this... Are they taunting her?? SHE complains they say it loud, maybe the one sneezing is across the room?? Good grief does it matter and if so then perhaps the teacher should be the adult and simply leave it alone.. How much time to it take to say God Bless You...