 In 1953 Block D was extended to the east with the addition of two square highset Boulton & Paul classrooms, with a large bank of awning windows on the south side, a verandah on the north side; and a square library underneath.The existing Block D stairs were enclosed by the northern verandah of the addition and a new staffroom to the south.In 1956 a new staff room, store and covered way were constructed between Block C and Block D; alterations to the existing Block C staff room included new windows to the east, a northern window relocated and opening infilled, and existing stairs moved slightly west to accommodate new covered way.