The Ontario Secondary School Teachers' Federation

60 Mobile Dr, North York, ON M4A 2P2
647-362-2267
http://www.osstf.on.ca

Ontario Secondary School Teachers’ Federation (OSSTF/FEESO)

OSSTF/FEESO, founded in 1919, has 60,000 members across Ontario. They include public high school teachers, occasional teachers, educational assistants, continuing education teachers and instructors, early childhood educators, psychologists, secretaries, speech-language pathologists, social workers, plant support personnel, university support staff, and many others in education.