Is class a common or proper noun?

"Class" can be both a common noun and a proper noun, depending on its usage:

Common Noun:

* When referring to a general concept of a group of people or things with shared characteristics.

* Example: "The students are in their English class."

Proper Noun:

* When referring to a specific, named class, like a course or a social group.

* Example: "I'm taking Calculus I this semester." or "The Upper Class hosted a fundraiser."

It's important to consider the context to determine whether "class" is being used as a common or proper noun.