South African Schools Act
http://esra-media.tripod.com/South_African_Schools_Act_1996_-_Updated.pdf
The SA Schools Act requires that parents must cause their children to attend school, between specified ages in art. 3. Children van be exempted compulsary school attendance, if it is in the interest of the child.
Art. 51 allows for children to be registered for education at home.
The relevant articles are highlighted.