at school在學校，在上學。在上課（指學生在學校求學）；in the school在學校，在這所學校（指在學校內任職，比如老師等）。at school也可泛指，而in the school則特指某一所學校。

at school含義及例句

釋義：在學校，在上課，在求學

例句：

1.He was disciplined at school for talking back to the teacher.

他因為和教師頂嘴受到了處分。

2.Each child had participated in extracurricular activities at school.

每個孩子都參加了學校的課外活動。

3.Her class teacher made a special arrangement to discuss her progress at school once a month.

她班上的老師作了特別安排，每月討論一次她在學業(yè)上的進展情況。

in the school含義及例句

釋義：在學校，在這所學校

例句：

1.The pupils assembled in the school hall.

學生在學校禮堂集合。

2.He was the only boy in the school who was known by his Christian name and not his surname.

他是學校里唯一一個被稱呼洗禮名而不是姓氏的男孩兒。

3.She is considered the best in the school.

全校數她功課好。