The governing board of any school district maintaining secondary schools or the county superintendent of schools, shall have the power, with the approval of the Department of Education, to establish special classes for adults designed to serve the educational needs of adults with disabilities. These classes shall be directed to providing instruction in civic, vocational, literary, homemaking, technical, and general education and shall conform to standards of attendance, curriculum, and administration established by the department. Attendance of adults with disabilities in such classes established by the county superintendent of schools shall be included for purposes of apportionments to the county school service fund.