EDUCATION Minister Ruairi Quinn is facing fresh opposition to controversial changes to the Junior Cert, amid criticism by a schools management body for failing to engage with representative groups.
Teachers' unions have expressed concern at the scale and schools' capacity to cater for the complete overhaul of the Junior Cycle assessment system.
The TUI said it will ballot its members on non-cooperation, as will the ASTI, in a fresh blow to Mr Quinn's hopes of reform.
The new programme aims to reduce the emphasis on a final exam and to allow more opportunities for independent thinking.
Mr Quinn said his department was prepared to resolve issues raised by teachers about the new cycle, which is due to be phased in from next September.