You can easily create your own private meeting without letting your class fellow/employees know.
Follow these steps so that you can create your own private meeting.
In TEAMS, on the left side of the screen there would be calls.
By clicking on calls, there would be option of Add speed dial and New group on the screen.
Click on Add speed dial.
You can add your class fellow/colleague and have a private meeting with them.
I hope this article was helpful for you.