"I soon found myself wondering as I axed someone to death and watched them simply disappear what impact that would have on them; have they lost yet again?"
Fortnite is a multiplayer online game in which players can choose to team up with friends or go it alone against 99 other people until there is only one person or team left standing.
The game is free to play but cosmetic items like costumes and weapon skins are purchased via in-app purchases ranging from $7 to $99.
She had concerns that some vulnerable players were susceptible to bullying on the game as some people would target them over and over again.
"The division between those that play and those that don't, the anxiety as pupils are ganging up on the game and targeting the same child over and over again.
"The tiredness of pupils as they game until the early hours of the morning - unbeknownst to their parents much of the time."
She said the game was better than some other titles pupils at the school were known to play.
Call of Duty was a very popular game with students, a game restricted to players over 16, which emulated a war-time environment with blood and gore.
The latest iteration of the now 15-year-old franchise, Call of Duty: WWII, puts players in the shoes of both Allied and Axis forces during iconic historic battles during World War II.
"Fortnite has a lack of blood and gore and has a simpler cartoon quality," she said.
University of Waikato's Dr Gareth Schott, who has studied gaming for 15 years, said although Fortnite wasn't overly violent, children who played the game with strangers could be exposed to other inappropriate content.
"You can [listen to] other people's commentary so children playing it might be exposed to strong language as a result of that."
