I think a classroom can be a safe space because
"Receiving respect from others is important because it helps us to feel safe and to express ourselves. Respect means that you accept somebody for who they are, even when they're different from you or you don't agree with them. Respect in your relationships builds feelings of trust, safety, and wellbeing."
An aside is a dramatic device in which a character speaks to the audience. By convention the audience is to realize that the character's speech is unheard by the other characters on stage.
