I'm gonna go out on a limb and say nothing here is actually written in a language we understand. Unless we're gonna assume everyone in the universe speaks and reads English. But you do have a valid point.

[ This very well could be a place that thrives on oral tradition, in which case, the Doctor will thrive. She's seen some teenager-ish looking people, but she's stopped assuming anyone is the age they look. An embarrassing lesson to learn. ]

And...probably could, but if no one's enforcing school, I'm not gonna hold my breath on kids showing up. At least I probably wouldn't have. I was too busy exploring, hated bedtimes and rules. This place would be an unregulated Utopia.