- Elementary Teachers' Federation of Ontario
 - Ontario Alliance of Christian Schools (OACS)
- Includes new publications, curriculum information, administrative resources, and discussion groups.
- Ontario Alternative Education Association (OAEA)
- Clearinghouse for information related to alternative approaches to education.
- Ontario Association of Career Colleges (OACC)
- Seeks to create a provincial voice working with the government on behalf of the private career college.
- Ontario Association of Police Educators
- Ontario Federation of Teaching Parents (OFTP)
- Non-sectarion, nonprofit organization committed to common concerns of home schooling parents.
- Ontario Modern Language Teachers' Association
- Provides leadership in the development of language policy documents and curriculum and promotes language learning.
- Ontario Public School Boards' Association
- Ontario Secondary School Teachers' Federation
- OSSTF/FEESO, founded in 1919, has 50,000 members across Ontario.
- Ontario Society of Education Through Art (OSEA)
- Nonprofit organization that actively promotes and advocates learning through the visual arts and is a recognized affiliate of the Ontario Teachers Federation.
- Organization for Quality Education
- A group of Canadian parents, teachers, trustees, ratepayers, and business people who are dedicated to reforming elementary and secondary education in the Province of Ontario.
- Teachers Fraternal Society of Ontario
- Nonprofit organization that provides insurance and fraternal benefits to educators in Ontario.
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