Some students believe that it's not a good idea for teachers to visit their homes.

部分学生认为老师家访不是好主意。

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Because of this, some believe that doodling during a boring lecture can help students pay attention.

正因如此，一些人认为在无聊的课堂上涂鸦可以帮助学生集中注意力。

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Some teachers believe that students should study at their own pace.

一些老师认为学生应该按照自己的节奏学习。

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But some researchers believe that the generally steady improvement since 1990 means American students are definitely on the right track, especially in this era of high-stakes educational testing.

NPR: Mixed Report Card for U.S. Schools