It's up to the teacher to provide a variety of types of input in the classroom.

教师负责在课堂上提供各种各样的信息资源。

A teacher's job is relatively safe, even if they perform under par in the classroom.

教师的工作是相对保险的，即使他们在教室里的表现低于预期的标准。

Students learned the practical application of the theory they had learned in the classroom.

学生们学会了课堂上学到的理论的实际应用。

He is studying in the classroom.

他正在教室里学习。

We studied in the classroom.

我们在教室里学习。