Marli Van Breda was left seriously injured in the attack at her family’s home early this year.
Martin, his wife Teresa and their eldest child, Rudi, were found axed to death in their home on the De Zalze Golf Estate.
Her other brother Henri also survived the incident.
Family spokesperson Ben Rootman says the teen’s progress is still being carefully monitored by her medical team.
“Marli is back at school and the family is very, very grateful for it. For a young woman that has been through such traumatic experiences, it’s amazing to see her coming back to life.”
