Work on rebuilding a school to give pupils "the best start in life" is expected to begin later this year.
Riverside Primary School in Seacombe is one of two schools in Wirral, Merseyside, set to be redeveloped after funding was agreed in 2022.
In a video publicised by Morgan Sindall Construction (MSC) who will be delivering the new project, pupils described needed to wear coats inside the current school building when the heating was not on.
The school's headteacher said the new school, off Brighton Street, will "make a huge difference" to pupils.