VANDERBIJLPARK - The official joint memorial service for the four pupils who died at Höerskool Driehoek took place on Monday at Kompasgemeente in Vanderbijlpark.
At least 12 others remain in hospital after the tragedy.
Gauteng MEC for Education Panyaza Lesufi sent his condolences to all the families.
He said 1 February will always be a difficult day for the education sector.
Hoërskool Driehoek has assured parents their children are safe as schooling resumed on Monday.
As the investigation into the collapse continues, many are still waiting for answers.