"Jason was failing in school because he had to be removed from class so often," says Grimaldi.

“杰森没法正常上学，因为他常常不得不被请出教室。”格林梅尔蒂说。

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Speaking to the BBC, the girl's father called for some staff to be removed from the school to protect pupils.

BBC: Stanbridge Earls School

In 2006, the NBA required players to be at least 19 and a year removed from high school before they could be eligible for the draft.

WSJ: The Elusive Undefeated Season��1976 Indiana Hoosiers

The new guidelines also are more in line with laws in 43 states and the District of Columbia that require youth and high-school athletes to be removed from play and to return only after at least 24 hours and with the permission of a health-care professional.

WSJ: Tougher Rules Advised for Athletes After Concussion