The Department of Education is still "working towards" moving students back onsite at Wee Waa High School after an unknown illness swept through the school cohort.
Several students came down with what's believed to be an allergic reaction after rainfall several weeks ago, and the site has since been closed.
Year 11 students have now started on-site lessons at the primary school as of Tuesday, with the remaining students set to return to face-to-face learning as soon as possible.
"The relocation will continue while a thorough investigation is undertaken by the Department and School Infrastructure NSW with the support of NSW Health," a department spokesperson stated.
The safety and wellbeing of everyone in attendance at the school remains top priority, they said.
"The safety and wellbeing of students and staff at Wee Waa High School is our first priority," they said.
The school is temporarily relocating to the Wee Waa Public School site until the cause of health concerns is determined.
It's caused havoc for students, one taking to Barwon MP Roy Butler's Facebook page to say that the constant movement and "shuffling around" of the school community "has been horrendous and isn't beneficial to our education whatsoever".
"Our teachers, principals and broader school community has worked tirelessly over the past couple of months if not years to get the deserved attention and action our much [loved] little school needs.
"We hope that the Department of Education together with NSW Health can bring this issue to a close soon!"
Education Minister Sarah Mitchell said the investigations had been "extensive" and she had been kept abreast of developments regarding the mystery illness and resulting disruptions.
"I am speaking very frequently to the secretary of the department and the head of the school infrastructure, because we need to find out what's gong on.
"We've been working quite extensively throughout the year and we need to get to the bottom of what's going on and most importantly support the school community and support the students while we do that work."
She hopes to visit the school once parliament finishes for the year to meet with the staff and the PNC to discuss the way forward.