School's Out

When substitute teacher Pierre Hoffman takes over an experimental class at a prestigious school, he soon realizes that something is amiss with his students. They are hostile and distant, and it becomes clear that they are hiding a dark secret. As Pierre digs deeper, he discovers that the class has been traumatized by a tragic event and has turned to violence and extremism. With the help of a dedicated colleague, Pierre must confront the truth and stop the class from spiraling out of control.

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Some movies that have similar genres and were produced around the same time as School's Out include Killers of the Flower Moon, The Killing of a Sacred Deer, Speak No Evil, Inheritance, Nanny Cam, Suburbicon.