You have a class

Wednesday…

First Period: One Class
Second Period: Second Class
Third Period: Third Class
Fourth Period: Fourth Class

Lunch

Fifth Period: Fifth Class
Six Period: Sixth Class

Sixth class and school finish 3:00 pm

When was I told about my new conversation class with the teacher at 3:30?

Go on, guess, but be nice.
Beginning of the Fourth Period.

What should I do in the class and what are the levels of the students?
Do anything you want. Low or unknown.