I was having lunch yesterday with some friends at a Mexican place. As the hostess was seating us, I noticed that a student of mine from last year was having lunch with his family at the next table. After a couple of hugs and a "well look who's here" and "how's your summer going" and "oh you look like you've grown", I joined my friends at our table. After a while the boy got up from his table and walked past us. As he passed by me, he showed me our "going to the bathroom" signal we used in our class.
You see, a common first grade phenomenon is this: one kid asks to go the bathroom and all of the sudden all the other kids need to go the bathroom. So we have a discreet and silent signal that says to the teacher "I need to go to the bathroom. Is that OK?" That way it's not announced to everybody that Billy Bob is going to the bathroom and putting bathroom ideas in the other kids' heads.
So I just thought it was precious that this almost 2nd grader I saw at the restaurant thought he should let me know where he was going.