Heritage Open Day: Great Parndon School. Learn about the development of the building over the years. Guided tours will take place along with an exhibition to show how the buildings evolved from the first small school hall built in 1857, through to its latest transformation into a family home. This will show how the buildings were enlarged as the school grew until it reverted to church ownership in 1963 when the school closed and evolved into a church hall and community building eventually becoming a family home