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How to host a teen party
Consider having a second chaperone.
Monitoring a teen party without killing the mood is a balancing act that will require a good attitude. Having a second set of eyes will make you feel less frantic and allow you to cover more ground.
If the party is co-ed, having a chaperone of the opposite gender will help you deal with any issues that may come up. If you know a trustworthy older teen or twenty-something who can handle a crowd, recruit them to chaperone the party.