I will teach mathematics to new students tomorrow.

I attended a math class today.

The use of mobile phones is prohibited during class.

There is a class observation at my son's school tomorrow.

My child attends a supplementary school every Saturday.

This problem is very difficult.

Let's study at the library in the afternoon.

I plan to finish my work in the forenoon.

I will take the afternoon off today.

I go jogging every morning before noon.