For purposes of this chapter, unless the context otherwise requires:

1. "Adult" means any individual who is beyond the age of compulsory school attendance.

2. "Adult basic and secondary education" means: a. Instructional services for adults who: (1) Do not have the basic literacy skills necessary to function effectively in society; (2) Do not have a certificate of graduation from a school providing secondary education; or (3) Have not reached a level of education equivalent to that required for a certificate of graduation to be issued. b. Education for adults whose inability to speak, read, or write English is a substantial impairment of their ability to obtain or retain employment commensurate with their ability.