of his proposed $395 million 1982 school budget by instituting textbook rental fees for students. Although permitted by Virginia law, the plan, which included charging textbook fees from $22 for elementary school students up to $30 per year for high school students, was scrapped in the face of strong criticism. Controversy over Deck's handling of an investigation of recruiting violations by the Mount Vernon High School athletic department, his censure by the Fairfax Education Association for a mishandled school closing, unhappiness with his leadership style, which was characterized as "aggressive" and "abrasive", and pressure from the Fairfax County Board of Supervisors angry at Deck's proposed budget led to the school board forcing Deck to resign on June 24, 1982, only years into his four-year contract. The board appointed William J. Burkholder as acting superintendent. At its April 25, 1991 meeting, the school board approved a plan where several intermediate schools in areas of the county with declining enrollments that had for the previous 31 years only served seventh and eighth grades would add sixth graders and become middle schools. Three intermediate schools, Glasgow, Holmes, and Poe, added sixth-grade classes. In 1993, the four-year-old teacher merit pay was suspended due to budget cuts, and the school board voted to phase the program out completely over the next four years at its March 11 meeting. From 1965 to 2006, the county school system was headquartered at 10700 Page Avenue in an unincorporated area of the county surrounded by the City of Fairfax. In 2006, FCPS moved all of its operations from the Burkholder Center and several other school-owned and leased offices to the office building on Gatehouse Road. The school system has expanded to include over 196 schools and centers, including 22 high schools, 3 secondary schools, 23 middle schools, and 141 elementary schools. Fairfax County Public Schools (FCPS) also operates a fleet of over 1520 school buses, which transport 110,000 students daily. They operate on an operating budget of $2.5 billion through numerous funding sources. Today, FCPS is the largest school system in Virginia and the 10th largest in the United States. It also boasts an average on-time graduation rate of 91.5% and an average SAT score of 1213. The school district utilizes an electronic visitor management system to control visitors' access at its schools. Special education FCPS took over the education of students with mental disabilities from a parent-organized cooperative