Yikes! - The brain has a lot of growing to do in adolescence and even into young adulthood. That frontal brain just behind the forehead gets really busy.
You see teenagers stumbling over their own feet, arms flailing and not quite sure how to get from point A to point B. Their impulses are not under control and it might take some time for that to happen. Some are trying hard to pay attention without getting distracted and making decisions and imagining the consequences. And then there's the social skills needed for social situations for the rest of their lives.
This has happened or will happen to all of us. Parents and teachers and others, our children will get through it.