What is a collective noun for group of pupils?

There isn't one universally accepted collective noun for a group of pupils. Here are some options, depending on the context:

Formal:

* Class - This is the most common and straightforward term.

* Cohort - This term implies a group of pupils who share a similar experience or time period.

* Body - This is a formal term often used in educational institutions.

Informal:

* Bunch

* Group

* Crowd

* Set

You can also use creative or humorous options depending on the situation, such as:

* A hive of students

* A swarm of learners

* A gaggle of pupils

Ultimately, the best choice will depend on the specific context and your desired tone.