Just FYI--THEY'RE KIDS.
Kids don't behave like little adults, and their teachers, of all people, should know this. Children, especially younger ones, have trouble with the following:
1. Sitting still for long lengths of time.
2. Not talking for long lengths of time, especially when allowed to sit by friends.
3. Knowing when it is appropriate to ask questions and when it's appropriate to wait.
4. Staying calm when something fun is happening during the day, such as a holiday event or an extra long recess, etc.
5. Staying spotlessly clean.
6. Many other things.
I mean, come on. Kids are kids. They like to run and play and ask questions. They're curious--this goes away for most people as they get older. By and large, the kids I worked with were all still excited to learn... but they were equally excited to go outside and play with their friends at recess.
So no, children don't act like little adults. They won't sit idly through a boring presentation/lesson, they won't pretend to care about something that doesn't interest them, and they won't nod and understand if their school cuts their recess time.
Seriously. Just let kids be kids. Everyone needs a childhood.