PNGTA general secretary Ugmalubu Mowana told the Post Courier that teachers were not adequately prepared and that the government directives regarding the curriculum were introduced too quickly to be properly implemented.
He also said that it would create a lot of confusion.
Introduced in 2011 by the national government to improve the country's education standards, the new curriculum includes features such as professional development, inspections and improving school governance.
It also structures the PNG schooling system into a "2-6-6 system" - two years of elementary, six years of primary and six years of secondary schooling.