Keystone School is located in San Antonio, TX. It is a private school that serves 435 students in grades K-12. Keystone School is coed (school has male and female students) and is nonsectarian in orientation. The school belongs to the National Association of Independent Schools.
In 2010, Keystone School had 12 students for every full-time equivalent teacher. The Texas average is 15 students per full-time equivalent teacher.