He's even lowering students' grades if they say "bless you" after someone sneezes.
Steve Cuckovich says the practice is disrespectful and disruptive. He's banned saying "bless you" in his high school health class in Vacaville.
He even knocked 25 points from one student's grade for saying the phrase in class.
Cuckovich says the policy has nothing to do with religion, but says the phrase is just a outdated practice and disrupts class time.
"When you sneezed in the old days, they thought you were dispelling evil spirits out of your body," Cuckovich said. "So they were saying, 'God bless you' for getting rid of evil spirits. But today, I said what you're doing doesn't really make any sense anymore."
After parents complained about students losing points for saying "bless you", Cuckovich says he decided to stop the practice.
However, the teacher says he will just find another way to discipline students for saying "bless you" in class.