I used to be exactly that kid, until school got challenging (university)... Then I had less time to fuck around in class...
It's a source of frustration for me. I know, and always knew that I had the intellectual acumen to to better, but I never had the self discipline to do so. I tried every day to just buckle down and finish my work, but it is easier said than done.
On the other hand, it was always those mandatory literature classes that hurt me the worst.I always did better in the courses that required more thinking than reading.
After all, if you excel at working within established institutions throughout your life, you'll probably continue to follow whatever career path is expected of you as an adult.