It seems that otk is still practised in America. Here are the comments of three regular contributors to Yahoo Answers.
She needs to be placed across your lap face down. Panties lowered to her knees. You need to slap her bottom hard enough that she cries. You need to slap her bottom several times; after she is crying uncontrollably, slap her bottom 10 times, but harder. Let her cry. Give her a hug and then some privacy.
I usually have a talk with my daughters later, after they have regained their composure.