The girl wore a knee-length dress to participate in the tournament held in Malaysia.
The Florida high school has since apologized and removed the posters.
WHAT'S HAPPENING
Heres how women reacted to Sundays United Airlines controversy.
"Young girls should not be shamed."
A teacher told her 12-year-old her skirt looked like it was for "clubbing."
"I am 15 years old. You do not get to sexualize me like that."
A JetBlue passenger said that a gate agent in Boston asked her to change her shorts before she was allowed to board her flight to Seattle. A statement from the airline supported the agent and said that the woman's shorts could "offend" other passengers.
"By requiring female students to dress modestly, we are not penalizing them. We are protecting them!"