Pierce students took part in ISTA in 2013 when it was hosted by the American Collegiate Institute (ACI) in Smyrna in Asia Minor, in ISTA in the spring of 2014 which was hosted by the Takev School, also in Smyrna, and the ISTA in the fall of 2014 which was hosted by the Brannel School in Cornwall, England.

In May 2015, Pierce – The American College of Greece had the honor of hosting the ISTA Festival 2015, which was organized for the first time in our country. In this Festival, 100 students from 7 schools and 5 countries gathered together at PIERCE from May 7th to 10th for a creative four days