How does the author use symbolism in the novel, Whale Talk?

One of the major symbols in this story is the Cutter letter jacket. To T. J., the letter jacket represents all that is wrong with the world and Cutter High. The jacket vividly depicts how man often places great value on outward displays of achievement while ignoring what is really important. In earning a letter jacket for each member of the team except himself, T. J. strikes a blow against injustice and creates a more equal playing field for all the students at Cutter High.