What he did was: After an initial trail period of mixed classes, he changed the school policy.

他所做的是：经过一段混合班的试运行期后，他改变了学校的政策。

youdao

Do you follow school policy and rules?

你是否遵守学校纪律规范？

youdao

Cheating is a violation of the school policy. Students are expected to be be honest and studious. They should improve their studying methods and prepare well for exams.

作弊不对。违反校规。要诚实。努力学习，应改进学习方法，作好考前准备。

youdao

Betsey Stevenson is a business and public policy researcher at the Wharton School of the University of Pennsylvania.

VOA: special.2010.03.04

Nolan Bowie I'm Nolan Bowie. I'm a senior fellow Adjunct Lecturer in Public Policy at the Kennedy School of Government, Harvard University.

我是,我是哈佛大学，肯尼迪政府学院公共关系的特邀高级讲师。

麻省理工公开课 - 媒体、教育、市场课程节选

But,the focus turned on Hayward, says economic and environmental policy expert Robert Faulkner of the London School of Economics.

VOA: standard.2010.07.27

That led to a 10-day suspension for violating a school policy on promoting illegal drug use.

CNN: 'Bong Hits 4 Jesus' case limits student rights

Everyone has to say a few lines because school policy demands equal opportunities for all.

CNN: ASIANOW - TIME Asia

Mr. Walcott regularly holds town halls and attends school policy panel meetings.

WSJ: Parents Seen Less Involved in Schools