Eighth Grade, the Movie.

Eighth Grade’s Kayla Day — played by the excellent Elsie Fisher — is the heroine I wish I’d been for myself when I was 13. When we first meet her, in comedian Bo Burnham’s directorial debut, she’s making one of her YouTube videos, a series of “tips” and self-help advice dished out to an audience of 1 or sometimes none, following a model that’s seemingly worked for others. She dolls out advice on “how to get out there” or “how to have confidence,” – after all giving advice is the best way to boost one’s social standing online. Most of the time, though, Kayla is making these videos based on…