GROSSE POINTE PARK, Mich. -- Sister Kathy Avery won't put up with swearing on the playground at her school, and she's not above repeating the language to make sure everyone understands which words she won't tolerate.

The principal of St. Clare of Montefalco Catholic School had students stay after a Mass and informed the fifth- through eighth-graders she has a zero-tolerance policy for cursing.

Just in case anyone wasn't sure what she was talking about, Avery read off a list of the words and phrases that she was banning.

Some parents were shocked, but others applauded.

"In a way you would think a nun would shy away from something like that, but she's open with the children, very clear in her messages," said Margaret Roache, chairwoman of the school commission.