Hello angellars: I see this is your first post here on PC. So... welcome to PsychCentral! I don't know if you're just here seeking an answer to this one question or if you plan to hang in here with us. However, should you plan to continue on, I hope you find the time you spend here to be of benefit. In that case, you might consider introducing yourself over on PC's New Member Introductions forum. Here's a link:

https://forums.psychcentral.com/new-...introductions/

As to your particular question... I should say I'm not a parent... or a teacher. So I don't really have any basis upon which to judge what you're wanting to do. It certainly sounds like a nice gesture. I think you're correct as far as keeping it simple goes. On the other hand, I suppose you never really know what's going on at home or how your gesture will "play out". For example, if your were to mention how polite a child is or something like that, I could imagine some parents perhaps turning it around & asking the kid why s/he can't be like that at home! So while I certainly think what you have in mind is a nice idea, I do think you need to be cautious. At least these are the thoughts that came to mind as I read your post.