Form and use possessives.

Grammar nerds unite in the plea for appropriate possessive's. See what we did there? Yeah, if it gave you a chill, you might be a grammar nerd, too. We meet on Wednesdays down at the library.

But realtalk: your students will need to know singular possessives (the student's idea), plural possessives (the students' idea), and when not to use possessives. And all of the in-between toughies. 'S' and 'z' possessives, we're lookin' at you.