Peachtree Ridge High School is a public high school in Gwinnett County, in Suwanee, Georgia, United States. It is a part of Gwinnett County Public Schools. It is the only public school in the county to use block scheduling; Shiloh High School did at one point, but discontinued it in 2008. The school officially opened for classes on Monday, August 11, 2003, with enrollment topping 1,900 students. By November of the same year, another 19,570 square feet (1,818 m2) of athletic facilities (field house) were nearing completion.