The class was great behaved when the substitute was here
One way to use "class's" in a sentence is: "The class's project was a group effort that received high praise from the teacher." Here, "class's" is used to indicate possession or belonging to the class.
The term class interval is used in statistics.
working class hero's is a band.
He is giving the lecture in a class
This class will benefit me greatly.
There is rich, middle class, and poor. I, myself, am middle class.
Example sentence - My favorite college class is zoology.
Please use First-Class postage on letters.
the kid was misbehaving during class
Your new class is in that building over there.
in math class we learn about rhombuses
My physical education class in in the gymnasium.