Every year I figure out ways to make my charts smarter. Most of the time I think, "And why didn't I think of this before?" The charts above are this year's versions of my library charts. (They didn't start the year on the wall by the way. That's not the way good teaching charts work.) I like that they're easy for kids to follow, even kids who aren't readers yet. Charts won't be very useful if they're not friendly to everyone.
P.S. Have you read Smarter Charts by Marjorie Martinelli and Kristine Mraz? No? You need to.