Parents and pupils protested outside Skerton High School this afternoon against proposals which could see the school close next summer.
Lancashire County Council today began a consultation into the possible closure of the secondary school, which earlier this year was labelled inadequate” by Ofsted inspectors.
County Coun Matthew Tomlinson said low pupil numbers and teaching standards were two of the reasons the school could close.
The school has fewer than 200 students and Mr Tomlinson said only 18 had applied to start the new academic year, even though it has provision for 90 students.
But parents have vowed to fight the plans, and today, Monday, launched a campaign with banners outside the school gates.
Robyn Holtham, head of the parent action group and whose son Tom is a pupil at the school, said: “The gloves are off now, we have got to fight this and we are not going to take it lying down.
“We are going to fight for our kids and all the others who may need this school in the future.”
Another parent, who did not wish to be named, said she didn’t know where her 13-year-old autistic son would go if Skerton High closed.
“We specifically chose this school after hours of thought because it offered the best chance of education for our child,” she said.
“If it shuts, where will autistic children or those with special needs go?”
The local authority said pupils would be transferred to other schools in the area if Skerton does close.
A decision is expected by April 2014.
A consultation event will be held at the school on October 9.