youth groups in Groton and Dunstable." With the student population expanding from 370 in 1993 to its current levels, a new building was needed. In 2003 at cost of $35 million, the high school relocated to its current location near the border between the two towns it serves. Campus GD's campus lies on Chicopee Row on the Groton side of the Groton-Dunstable border. The current site is just to the east of Reedy Meadow and its fields are bordered by eastern white pine, as well as vernal pools including Bauch Pond and the Ennis Puddle. Near the upper fields and entrance to the grounds is the "Spirit Rock", a large boulder which student groups and individuals have periodically repainted since the spring of 2007. The main campus building was designed by HMFH Architects to allow outside light into nearly every room and thus features windows along many interior walls. An exception to that rule is Mr. Donnelly's technology room as well as the Black Box Theater which hosts both school and local community performances. Also located within the school is Public-access television cable TV station, The Groton Channel. In November 2013, students and their families were notified that excessive levels of coliform bacteria had been detected in the school's water supply. The system was disinfected and the problem was apparently resolved. The quality of drinking water at the school had been a concern since the new building's completion in 2003. Curriculum Most Groton-Dunstable students undertake a college preparatory curriculum that includes four credits of English, three credits of mathematics, social sciences, and laboratory-based sciences inscluding integrated science, two credits each of a single foreign language and physical/behavioral health, one credit of fine arts and one half credit of computer applications. Seniors must also complete a senior project. As G-D is on a 4x4 block schedule, full credit courses are equivalent to a year-long course in a school with traditional 40-50 minute periods. A small number of students with significant special needs instead participate in the Life Skills Experiential Learning program. Students can choose from 11 advanced placement coursesto earn college credits. The English department requires two courses focused on the role of the hero, one on American literature and one on Shakespeare and Chaucer. Electives include courses in both print and broadcast journalism, videography, film studies, theater arts, and creative writing classes along with an English literature AP course. The