A group representing students with special needs says the National Party is promoting the removal of disabled children from mainstream schooling.
The Inclusive Education Action Group says a 10 point plan for schooling released by National on Monday would turn back the clock for disabled students.
Co-convenor Ian Armstrong says he is appalled that National will drop what the party calls Labour's ideological emphasis on maintreaming.
Mr Armstrong says the 1989 Education Act gave all students, including those with disabilities, the right to attend their local school.
"What National are proposing is a return to the days before that where students with disabilities were segregated in separate schools and separate classes.
"We're strongly opposed to that, and that sort of proposal is completely at odds with human rights legislation and also with all of the educational research and evidence from the last 30 or 40 years."