wise beyond their years

No school today, so I've been running some errands this morning. As I was walking through my neighborhood, I heard a few sevenish-year-olds chatting as they rode bikes.

"Did you just say something mean about my teacher?"
"He said 'expectations.'"
"Yeah, and actually that's a good thing. Teachers should have expectations."
"It makes us want to obey them."

ha I don't know about that "obey" stuff.