Sure you are. God I hope you’re lying.
peoples /pē′pəl/
Plural form of people
noun Humans considered as a group or in indefinite numbers. Often treated as a plural of person, especially in compounds. “People were dancing in the street. I met all sorts of people. This book is not intended for laypeople.” The mass of ordinary persons; the populace. Used with the. **A body of persons **living in the same country under one national government; a nationality. The American Heritage® Dictionary of the English Language, 5th Edition • More at Wordnik
peoples plural of people (“a race, group or nationality”) The course studies the history of Africa and the peoples who lived there.
Let me be clear then. If you are in fact an English teacher, I believe that you are very bad at it. Don’t project your arrogance on me. I’m not superior just because I used a dictionary to quash the logical fallacy of your call to authority.