Bourne Academy is set to spend £300,000 on temporary classrooms as part of a multi-million pound boost for education in the area.
The academy hopes to install two temporary buildings, subject to planning permission.
Headteacher Laurence Reilly said: “The school is already at full capacity with more than 1,200 students, but the extra rooms are needed to meet our aim of reducing average class sizes across the school.
“This will enable us to give each child more individual attention and maximise their chances of achieving the best possible exam grades.”
Both buildings require planning permission from South Kesteven District Council, but as they are well away from any neighbouring residential properties the school does not anticipate any problems with the applications.
Mr Reilly said: “The funding for the buildings comes from the increased revenue available to the school due to its academy status.
“Several other improvements are planned, again ready for September, including a redesigned food technology room.
“It was pleasing to note in our recent survey of parents and students that they are pleased with the ongoing improvement in facilities at the academy, made possible by our sound financial management.”
Bourne Academy has also successfully secured a £70,000 grant from the Department for Education’s Academies Capital Grant Fund.
Mr Reilly said: “We continue to benefit from the increased funding that has come with academy status.
“We can now upgrade our fire alarm system and are already benefiting from the changes made in 2012, including more than 350 new computers, two new science labs and refurbished ground floor student toilets.”
Plans are being drawn up for a new £2.5m primary school on the Elsea Park estate in Bourne by Lincolnshire County Council. It would provide 210 places, 30 in each year group, which the council says will be needed in the town by 2015, based on growth projections. The county council will discuss the plans at a meeting in March.
In addition, Morton Primary School wants to build a new classroom and expand its library. The county council is preparing to contribute £160,000 towards the classroom.