EXCLUSIVE: He's about to become a multi-billionaire when Facebook launches its IPO on Friday [May 18, 2012] but here's CEO Mark Zuckerberg in more humble times, as a high school student. Tech wizard Zuckerberg, who just turned 28-years-old, briefly attended the public Ardsley High School in Ardsley, New York, before transferring to a private academy. While at Ardsley, Zuckerberg was a member of the fencing and cross country clubs, the debate team, as well as representing the school at a Science Olympiad and at Academic Challenge events, as these rarely seen pictures show. Pictured: Mark Zuckerberg in the cross country club, in 2000