Cornerstone College is an independent, Lutheran, co-educational, secondary, day school, located at Mount Barker in the Adelaide Hills south-east of Adelaide, South Australia. The College is a non-selective school, currently catering for approximately 740 students from Years 8 to 12. Facilities include a library, a basketball court, gymnasium, a canteen, an oval and a theatre. The school has a tradition of naming new facilities in a foreign language, the canteen is called Cibo Bello (Italian for 'beautiful food'), the gym is called inbarendi (aboriginal for 'meet one another'), the library is called Arnakalypsi (Greek for 'discovery') and the arts building is called Atelier. The houses are Battunga (green), Naturi (yellow), Moorak (red) and Aroona (blue). The house names are local aboriginal words. Cornerstone is affiliated with the Association of Independent Schools of South Australia (AISSA), the Association of Heads of Independent Schools of Australia (AHISA), and Lutheran Education Australia (LEA). Cornerstone was established in 1990 as the first Christian secondary school in the Adelaide Hills area, having been first proposed in 1984.