What he did was: After an initial trail period of mixed classes, he changed the schoolpolicy.
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。
2
Do you follow schoolpolicy and rules?
你是否遵守学校纪律规范？
3
Cheating is a violation of the schoolpolicy. Students are expected to be be honest and studious. They should improve their studying methods and prepare well for exams.