Program. The educational program of a school shall operate consistently with its statement of purposes. Based on the classification specified on the Certificate of Approval of a school, a school shall maintain at the school a written curriculum of its educational program for the following areas of instruction: English, language arts, mathematics, science, and social studies for kindergarten and each grade; and Secondary school courses for which credit is issued. A school shall implement its written curriculum as specified in §A(2) of this regulation. Instructional Materials and Equipment. A school shall maintain at the school instructional materials and equipment required to implement the written curriculum of the school as specified in §A(2) of this regulation. A school shall own the instructional materials and equipment required to implement the written curriculum of the school. Library Media Collection. A school shall maintain at the school a library media collection to support and supplement the implementation of the written curriculum of the school as specified in §A(2) of this regulation. A school shall own the library media collection required to support and supplement the implementation of the written curriculum of the school. Ratio of Students to Teachers or Average Class Size. A school shall have a written statement of its ratio of students to teachers or its average class size for the implementation of its educational program. A school shall give annually to parents or legal guardians of prospective and enrolled students the written statement of its ratio of students to teachers or average class size.