St Mary's School has been officially reopened after being refurbished and extended.
Lieutenant Governor Air Chief Marshal Sir Stephen Dalton did the honours at the primary school.
The three listed buildings that make up the school have been linked together.
Improvements have been made to ensure the classrooms are bigger.
The school will also have a nursery class for the first time from September 2022.
Children's Minister Deputy Scott Wickenden and new director general Rob sainsbury met some of the pupils.
The Lieutenant Governor praised the refurbishment saying that the works melded well with the old buildings and described the school as a 'great facility'.

Tourism bosses concerned about impact of UK autumn budget
Islanders asked about diesel and petrol car phase out
Government 'must act' to protect children from online harms
Jersey's skin cancer rates remain higher than England
Police warn of joyriders as two vehicles are taken
Strive Hotel blocked, £29m Millbrook House Hotel gets go ahead
Tiny Seeds launches campaign for Fertility Awareness Week
Public meeting called on future of Havre des Pas Lido