Bulli High School is open on Wednesday for Years 11 and 12 students only.
The school was closed on Tuesday due to flood damage caused by severe storms.
Areas affected include the administration building, maths rooms, industrial arts rooms, music rooms, special education classroom, the HSIE rooms, senior study room, the tiered learning centre, canteen and old gymnasium.
Lessons will not be on today for students in Years 7 to 10.
Staff will be on duty to supervise students from Years 7 to 10 whose parents need to have their children supervised.
Only part of the school will be functional on Wednesday as clean up and restoration works continue. Areas will be cordoned off to ensure the safety of students and staff.
An assessment will be made later today to work out whether to full re-opened the school for the rest of the week.
Parents, caregivers and students will be notified about when students will be able to return to the school via the school’s website.