xdf绿皮书３０

Educationcal Theorist:  Recent editorials have called for limits on the amount of homework assigned to children. they point out that free-time acctivities play an important role in childhood development and that large amounts of homework reduce children's free time, hindering their development. But the average homework time for a ten ten year old, for example, is little more than 30 minutes per night. Clearly, therefore , there is no need to impose the limits these editorials are calling for.

which of the following is an sssumption on which the educational theorist's argument relies?

  D; In most schoools , if not all, the homework assignments given are of a length that does not diverge widely from the average.

  请教思路？

那个家伙说学生的平均作业时间只有30分钟，不会影响课余活动。

但是如果，这30分钟，是由，假设1个学校的学生需要做2个小时的作业，而另外3个学校的学生不做作业的话，那么显然第一个学校的学生的课余活动是受到了影响的，因此，需要一个前提，也就是，学生们的作业时间都距离30分钟不太远。