I was just at Blockbuster, acquiring some quality cinema, when the kid behind the counter asked if I used to teach math at such-and-such middle school. I did.
I didn't remember his face or name--in my defense, I haven't taught at that school in 5 years--but he remembered me. And he told me two things that really felt good to hear.
"You were one of my favorite teachers." What teacher doesn't want to hear that? Unfortunately, he followed that with, "I still failed your class, but...."
He also said, "One time I was in trouble in the office, and you talked to me. You told me that when you're at the bottom, the only way to go is up. I always remember that. When times are tough I remember that and I feel better."
Having an impact, one kid at a time. Feels good.