The post is for principals, but applies just as well to teachers:
6 Ways Principals Can Connect With Students: Be open to showing kids how much you care about them. Be their advocate. Care about them. Say kind and authentic things about them. Embody to them how you would like them to treat all of those in their lives.
Needless to say, I don’t agree with the whole “Don’t let them see you smile until December” garbage.