Subchapter I. General. § 38–1901. Sexual discrimination; salary deductions; employment as clerk or librarian. § 38–1902. Installment payments to certain teachers. § 38–1903. Teachers in the Americanization schools; custodial staff. § 38–1904. Teaching vacancies. § 38–1905. Vocational education. § 38–1906. Classification of research assistants. § 38–1907. Employment of substitutes for engineer, janitor, laborer, fireman, or caretaker; salary deductions. § 38–1908. Heads of certain departments; compensation. § 38–1909. Employment of substitutes — Authorized; compensation. § 38–1910. Employment of substitutes — Retired teachers.