Middle-class families contract with a puller to take a child to school and pick him up; the puller essentially becomes a family retainer.

中产阶级家庭与车夫签订合同，让他送孩子去学校以及接孩子放学。车夫实际上变成了一位家仆。

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After five years ONS will assess each new school to judge whether to renew its contract.

五年之后，ONS将对每一个新学校进行评估，决定是否与其续签合同。

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While in high school, Roberto signed a contract to play baseball for the Santurce Crabbers in the Puerto Rican winter league.

VOA: special.2010.04.11

But several years later when he was required to sign a school contract stating that his daughter would have no access to the Internet, "she thought it was ridiculous, " he said.

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Pamela Dixon, a privacy advocate at the World Privacy Forum, tells of an elementary school teacher whose contract was not renewed with a Solano County, Calif. school district.

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"We're in the business of educating children and having them coming to school and not in the business of trapping them into a contract, " said Gabriella Rowe, head of the Mandell School.

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