Earning Your OSSD

Diploma RequirementsĀ And Granting of Equivalency Credits

To obtain an Ontario Secondary School Diploma (O.S.S.D.), a student needs to earn 30 credits including certain compulsory credits. A credit is earned by attending 90 hours of instruction and obtaining a mark of at least 50% on work completed in the course. PLEASE NOTE: To be successful in subsequent courses or higher education, a mark of 70% is often needed, so students should work toward grades higher than 50%.
Adults are eligible for equivalency credits through the Prior Learning and Equivalency Process (PLAR). PLAR applications must be submitted 1 month prior to the end of the quad. Applications cannot be processed for students not enrolled at Yorkdale.
Students can apply for the PLAR process only after having successfully completing 2 quads at Yorkdale, have studied 4 courses at the senior level (grade 11 or 12).

Secondary School Diploma Requirements:
30 credits (18 compulsory and 12 optional)
Literacy requirement
40 hours of community involvement


Students must earn the following compulsory credits in order to obtain the Ontario Secondary School Diploma:
4 English (1 credit per grade)
1 French as a second language
3 Mathematics (at least 1 credit in Grade 11 or 12)
2 Science
1 Canadian history
1 Canadian geography
1 Arts
1 Health and physical education
.5 Civics studies
.5 Careers

Plus 1 credit from each of the following groups:
1 additional credit in English, or a third language, or Social Sciences and the Humanities, or Canadian and World Studies, or Guidance, or Cooperative education
1 additional credit in Health and Physical Education, or the Arts, or Cooperative education
1 additional credit in Science (Grade 11 or 12) or Technological Education (Grades 9-12) or Cooperative Education