When students walked toward my classroom on the first day of school, I would say to a student I didn't even know yet, "Good morning! (and motion to the bulletin board to my right with a smile) Who are you closest in height to?"
It was so fun to see that first student look at the board, see the ruler, measure themselves, and then search the board :) As the other students approached my classroom I would always hear one of them say, "Whoa! What's this?" as they watched the first student measuring themselves.
Why did I do this?
It gave me a chance to bond with students right away, it gave students a way to talk to each other, and it gave me a way to hook them into history by making a personal connection before they even knew who I was or what our class was going to be like. It's such a fun way to start the year!
Here's how I put this bulletin board up. If you have access to a laminator, laminate each printable to preserve them. Take a picture once it is up so you have a guide to install it the same way the following year!