Jem's curiosity and impluse to accept any dares from his friends shows his bravery. This search reflects his personality and character.
Jem has always wanted to play a sport, american football. His passion to play football will drive his mind to search for information about the NFL.
There had been many efforts to try to get Nathan "Boo" Radley come out of his hermit kingdom. A google search such as the one above might be a step closer to looking for a solution.