Ontario Secondary School Teacher's Federation (OSSTF)OSSTF/FEESO is a strong, independent, socially active union that promotes and advances the cause of public education and the rights of students, educators and educational workers. While establishing working conditions for its members, OSSTF/FEESO also works to build strong public services, preserve academic freedom, prevent the privatization and commercialization of our educational institutions, ensure that students receive an education free of bias and discrimination and provide an equitable opportunity for all students to succeed in a strong, well-funded public education system.