You can stream Young Sheldon S01E19 on various platforms, including:

We see Sheldon interacting with intellectual equals for the first time.

Episode 19 Plot Summary: "Gluons, Guacamole, and the Color Purple"

Sheldon tries to navigate the school science fair solo (because teamwork? No thanks), while Meemaw drops some real wisdom about fitting in. Meanwhile, Mary and George Sr. deal with a family secret that changes things at home.