Looks like a Reboot to me.
This reminds me of Beware: Children at Play, a 1989 movie from Troma. Maybe the writers of this movie are pulling a Amy Schumer!
sharehere's the log line from IMDB for Beware: Children at Play
A mentally-disturbed teenager kidnaps and brainwashes children into cannibalistic psychopaths - but not when the adults intervene.
That doesn't sound anything like kids eating bad meat and turning into zombies, where a group of teachers must fight them off to survive. share