You can give classroom tests once every few weeks — sometimes even once a week.

每隔几周，就要有一次当堂测试———有时甚至每周一次。

youdao

You can give classroom tests once every few weeks -- sometimes even once a week.

每隔几周，就要有一次当堂测试———有时甚至每周一次。

youdao

But even informal classroom tests, however, can break up learning rather than encourage it if they are set too often.

但是，即使是不正规的课堂测验，如果太频繁的话，也只会打断学生的学习，而不会起到鼓励的作用。

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If DVDs and online tests replaced the classroom, a lot of teachers would be rendered superfluous.

FORBES: Magazine Article

Teachers seeking "board certification" in their specialty must clear a number of hurdles, from subject matter tests to evaluation of classroom performances.

UNESCO: II Part Analytic Section

Education department official Katrina Godfrey said the results of the tests were not collected anywhere outside of the classroom and had been "designed to help pupil, teacher and parent work together to achieve the pupil's full potential".

BBC: Education Committee