英语翻译On the instructor side of the coin,deciding upon the app

英语翻译
On the instructor side of the coin,deciding upon the appropriate homework level and exactly what to assign requires a lot of time.To process the homework also takes a finite amount of time.The labor intensive extreme of this process is to collect each assignment,the instructor to fully grade each portion of the work,assign values,annotate the errors,and suggest alternative solution methods.The highest student utility occurs with the return of the assignments to the students,with a copy of the instructor’s solution method and answer,the next class period.The opposite end of the scale is to not collect the homework but ask the students if they have any questions.Those questions are then discussed in class.Most instructors use a method somewhere between these two extremes.Several of the methods used are 1) just check for completeness of the problem development,2) check for the correct answer,3) sample one or two problems for full evaluation and assign that grade for the homework,4) let a grader evaluate the work based on the instructor solution and 5) have each student pass his work to another student to grade as the instructor reviews the material in class.Obviously there is a significant variation in the amount of processing time required by the instructor for each of these methods.

这是我的翻译版本,希望对你有所帮助!

翻译
积极地来看,选择合适的课后作业等级和明确分配需要很多时间.批改作业也相当耗时.最密集的课后工作,是去掌握每一份作业的具体情况：批改的人看过每一个认的作业,给他们每一份都评价等级、纠正错误,并写出修改建议；这在学生身上所达到的最佳效果,是在下一阶段,他们照着批注修改或誊写、回答什么的.与此相对的,有相当一部分人不批改作业,而是问学生们有没有疑问,再将这些问题拿到课堂上讨论.绝大部分老师布置课后作业的方法,介于这两个极端之间.方法如下：
只是查看学生作业是否完成
只是看作业的答案是否正确
大致找出典型的一两个问题,全班讲解,再以此布置下一项作业
让一个成绩好的学生按照参考答案批改正误
在课堂上,让同学之间相互交换作业,像老师一样批改.
显然,老师们这些缩短课后反馈的时间的办法,也是具有一定意义的.