St. David Catholic Secondary School, established in 1965, is a Roman Catholic high school instructing students from grades 9 to 12. St. David CSS is located in Waterloo, Ontario and is a member of the Waterloo Catholic District School Board. Its building is the oldest secondary school building in the board. Historically it was an a junior high school, instructing students from grades 7 to 10. St. David received full funding from the Ontario Ministry of Education in 1985, when the school changed its educational focus to students in grades 9 to OAC. Since the OAC year of secondary school was phased out of Ontario schools in the 2002-2003 school year, St. David CSS now teaches grades 9 through to 12. At present (2011) St. David educates 1045 students. St.