Learning to Keep the Peace on the Court

Nate Oliver teaches a group of Berkeley youth some basketball referee hand signs during a new program called the Referee Training Corps on Monday July 18, 2011. The program is sponsored by the city of Berkeley's Young Adult Project. (Photo by Doug Oakley)

Students in the Berkeley Referee Training Corps practice their hand signals on Monday July 18, 2011. (Photo by Doug Oakley)

Nate Oliver, right, teaches Justin Shepard, 17, how to call a foul in a basketball game during a session of the Referee Training Corps sponsored by the city of Berkeley's Young Adult Project. (Photo by Doug Oakley)

Nate Oliver, left, gets ready to blow his whistle during a session of Berkeley's Referee Training Corps sponsored by the city's Young Adult Project on Monday July 18, 2011. (Photo by Doug Oakley)