The governors had wanted a brick school, but according to Sir Percy Jackson, the Chair of the West Riding LEA, "Dinnington would never have had a new school building at all if it had not been a wooden one". The Rotherham Advertiser explains that the question of the school was raised "at the height of the economy stunt". There was recognition, by both the governers and the Board of Education, that the maintenance required by wood would mean that brick was likely to prove cheaper in the long term, but "at the time the Board of Education would hardly permit the building of schools at all, and even then they only allowed it under exceptional circumstances". Building in timber was reckoned to provide a saving of 30-40% over brick, and this had allowed the West Riding to continue building schools. Wood was felt to have certain benefits beyond its cheapness: it was considered healthier and easier on the voice than a more solid brick structure. But as we now know, wood rots if not looked after, and burns easily. Low pressure hot-water heating supposedly meant that "the possibility of fire is reduced to an absolute minimum". It also meant there was hot running water in the sinks. Despite this, the governors were still vocally disappointed that the school was made of wood and not brick.
Dinnigton's timing couldn't have been much worse: in 1936, as a drive to reduce unemployment, school building came back into favour, and the Board of Education returned their new-build grant to the pre-1931 proportion of 50% of building costs rather than the 20% it would've been when Dinnington was put up.
Based on the designed intake (640), and including the halls, the school averaged a floorspace of 23 square foot per pupil; without the halls it was 17½ square foot per pupil. This appears to be pretty-much average for schools at that time.The boys' half and girls' half each had nine classrooms and a hall, arranged in a "H". This double-H created an enclosed central quadrangle and two open-ended quads, as depicted below (girls west, boys east).