Don’t forget you’uns or yinz!

I struggled with this when I was a school teacher. English lacks a good way to clarify you are addressing a group vs one person, which comes up a lot in a classroom. “Class, you…” is clunky, “You guys…” has obvious issues, and y’all or any other contraction is generally considered bad grammar. I generally went with y’all. Kids would laugh about it, but that seemed to help get their attention.