THE Armidale School has cancelled several school functions in the wake of the death of its principal, as it prepares to farewell him this week.
In a letter to parents, acting headmaster Alan Jones said the school had "reassessed in the light of the events of this week" several events in the TAS calendar.
Murray Guest died in a crash on Waterfall Way, near Wollomombi, outside Armidale on Tuesday morning.
The service, which will begin at 11am, will also be live-streamed in the school's hall and other centres.
Thousands are expected to say goodbye to the 21-year veteran leader of the school.
Mr Jones told parents on Thursday that timetables, classes, sport and creative arts would continue as normal for the moment, "because routine and activity are in the best interests of us all".
He thanked parents for their messages of condolences, flowers, wishes and prayers for the Guest family and the staff at the school.
"The magnitude of care and support from the TAS community has been quite extraordinary and has helped us all deal with our loss," Mr Jones said.
The bivouac camp set for November 7 and 8 has been cancelled, but Trek 125 will continue as planned the next week, but students can opt out as the school reels from the tragedy.
TAS Fest - the 125-year celebration in mid-November - has been cancelled, Mr Jones adding the school community was working its way "through the process of coming to terms with our grief".
"In this time of great sadness comes unity, and I encourage you all to embrace this moment and support each other," he said.
Mr Guest was 60. He is survived by his wife, Joanne, and his children, Annelise and Harry.