Saturday is my day off.

My child attends a supplementary school every Saturday.

Every Saturday, I go to the cram school.

I study at the library every week.

I commute to the office by train every day.

The children are playing in the park.

I stayed at school to attend supplementary classes in math.

He goes to school every Saturday to take supplementary classes in math.

I attended a math class today.

I will teach mathematics to new students tomorrow.