Exam

There are many tests in each semester in our school.

Alternatives:Each semester, there are many test in our school.

There are Chinese tests and math tests. What do you mean "There are Chinese tests?" Are you saying, the students are taking Chinese language test, Chinese grammar tests, or no-foregin tests sent from overseas?

There is one Chinese and one math test when students return to school from their home on Sunday night. 什么？

The test is on Sunday night?

The teacher would correct the tests on Monday. They would notify students about their test score after all the tests have been corrected. Students would correct the errors of test papers carefully.