There was a kid that lived in africa most of his life and now he is sent back to school. Anyone recognize this?
I believe you are talking about the Cartoon Network show, Unnatural History.
The main character is the son of globe trotting anthropologists, but then he comes back to the United States to attend school in Washington, D.C. Once he is there he uses his knowledge to solve mysteries with his friend Maggie.
It was also the second CN show to have a TV-PG-V, other than Adult Swim and Toonami (That were targeted at adults), and featured warnings at every commercial break.