According to a NSW Department of Education release as at 30 June 2013
The Department has just over 44,788 teaching spaces in schools. About 10% per cent of these are demountable
This equates to approximately 4,479 demountables. The same document states “In 2012/13 funding was provided for 39 new classrooms” which suggests that if this level of funding is maintained, demountable classrooms will exist for at another 114 years so perhaps by the year 2127 there will no longer be a reminder of how little public education was valued in 2013.