The Post's Bill Turque tells the story:
On one particularly rowdy day, she [Rhee] said she decided to place little pieces of masking tape on their lips for the trip to the school cafeteria for lunch.
"OK kids, we're going to do something special today!" she said she told them.
Rhee said it worked well until they actually arrived at the cafeteria. "I was like, 'OK, take the tape off. I realized I had not told the kids to lick their lips beforehand...The skin is coming off their lips and they're bleeding. Thirty-five kids were crying."