求翻译：就作业的布置而言，为改变以往教师“一家之言”的做法，每单元授课结束以后，让学生自己找资料，出一份单元测试卷，然后让学生交换答题，由出卷同学和答卷同学共同批阅。是什么意思？

In terms of the arrangement on the job, to change the past, teachers "one of the words" approach, after the end of each teaching unit, let students find information, the volume of a unit test, and then allow students to exchange answer, respondents from the students and the students roll out joint a

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Speaking of the work arrangement, for change former teacher “single opinion” the procedure, each unit teaches after the conclusion, lets student look for the material, leaves a unit to measure the examination paper, then lets the student exchange the answer, by leaves curls schoolmate and answer pap

Job placement, to change the previous teacher "controversial topics" approach, taught since the end of each unit to enable students to find information, out of a unit test, and then ask the students to Exchange questions, jointly by the test students and answer student approval.