Premier Mike Baird is considering stripping any reference to the availability of ethics classes as an alternative to special religious education from school enrolment forms after being lobbied by faith groups.

Documents reveal Mr Baird's office pushed for changes to the enrolment form be made before the election, despite the education department proposing it happen just after the March 28 poll.

Christian Democratic Party MP Fred Nile. Credit:Marina Neil

But the government denies it is part of a deal with Christian Democratic Party MP Fred Nile - an opponent of ethics classes - whose support the government needs to pass its electricity privatisation legislation.

Documents obtained under information access laws by charity and ethics class provider Primary Ethics show faith groups blamed the enrolment form for falling participation in their classes for the 2015 school year.