When I watched some Simpsons future-episodes, I realized one thing: Bart is usually a stupid jobless slacker in them. But why? Yes, I know that he is not very good at school, but he will probably get better later. He will study at university, get a diploma and find a job which he will like.
Bart is not stupid and everybody knows it... so why does he always have roles as a slacker in these episodes?
Art (c) Me
The Simpsons (c) Matt Groening
Yes, Bart is ten in the series. He is not the smartest, but I agree with you, he is much smarter than other kids his age.