OSSD Compulsory Courses: The 18 Credits Every Student Must Take
For school owners evaluating a new academic pathway, and for parents weighing where their child should study, the Ontario Secondary School Diploma (OSSD) often rises to the top of the shortlist. It is globally recognised, university-friendly, and built around a flexible credit system that adapts to individual learners. Yet before any partnership agreement is signed or any enrolment decision is made, one question deserves a clear answer: what exactly must a student complete in order to graduate?
The OSSD requires 30 credits in total. Of these, 12 are optional and chosen freely, while 18 are compulsory. These OSSD compulsory courses form the academic backbone of the diploma, and understanding them is the first step toward planning a credible, compliant programme. Whether you are assessing the OSSD as a business opportunity for your school or as the right fit for your child, this guide breaks the requirements down in full.
The Full List of Compulsory Credits by Subject
A student earns one credit for each course successfully completed with a minimum grade of 50 percent. The 18 compulsory credits are distributed across core subject areas, with fifteen tied to specific disciplines and three drawn from the group requirements explained further below. This distribution is deliberate. It guarantees a well-rounded foundation in literacy, numeracy, science, and citizenship, while still leaving space for choice.
The subject-specific compulsory credits are as follows:
- Four credits in English, one for each grade from 9 to 12
- Three credits in Mathematics, with at least one earned in Grade 11 or 12
- Two credits in Science
- One credit in Canadian History (Grade 10)
- One credit in Canadian Geography (Grade 9)
- One credit in the Arts
- One credit in Health and Physical Education
- One credit in French as a Second Language
- One half credit in Career Studies
- One half credit in Civics and Citizenship
Together these account for fifteen credits. The remaining three compulsory credits come from three defined subject groups, giving students room to follow their strengths while still meeting provincial standards. For a school planning its course catalogue, this split matters: fifteen credits are fixed, but the final three can be shaped around local expertise and student interest.
Group 1, 2 and 3 Additional Requirements Explained
The last three OSSD compulsory courses are selected one from each of the following groups. This design ensures breadth without forcing every student down an identical path.
Group 1 covers English, French as a Second Language, Native languages, First Nations, Métis and Inuit studies, classical and international languages, social sciences and the humanities, Canadian and world studies, guidance and career education, and cooperative education.
Group 2 covers Health and Physical Education, the Arts, Business Studies, French as a Second Language, and cooperative education.
Group 3 covers Science at the Grade 11 or 12 level, Technological Education, Computer Studies, French as a Second Language, and cooperative education.
Two conditions apply to these selections. A maximum of two French as a Second Language credits may count as additional credits, one from Group 1 and one from either Group 2 or Group 3. Likewise, a maximum of two cooperative education credits may be counted, selected from any group. For schools building out a programme, these groups are where local strengths, teacher expertise, and student demand can be balanced most effectively.
Common Mistakes When Planning Compulsory Credits
Even experienced administrators can stumble when mapping compulsory credits. A few recurring errors are worth flagging early.
The first is treating the list as entirely rigid. In practice, a principal may substitute up to three compulsory credits to meet a student’s documented needs, within defined provincial limits. This flexibility exists to support learners, not to shortcut requirements, and every substitution is recorded on the transcript.
The second is overlooking the group credits. Because Groups 1, 2 and 3 sit inside the 18, some planners mistakenly count them as electives, which leaves a gap on the transcript that only surfaces near graduation.
The third is forgetting the non-course requirements. The OSSD also mandates 40 hours of community involvement, the provincial literacy requirement met through the OSSLT or the literacy course, and a minimum of two online learning credits. None of these should be an afterthought.
The fourth is ignoring the entry year. Students who entered Grade 9 in 2023 or earlier follow the 18-credit structure described above. Those entering from the 2024 to 2025 school year onward follow an updated distribution of 17 compulsory credits that adds a mandatory Technological Education credit and a STEM group requirement. Confirming a student’s entry year prevents costly planning errors.
Finally, schools admitting students after Grade 9 sometimes overlook Prior Learning Assessment and Recognition, which grants equivalent credits for verified prior study and can significantly ease a transfer student’s path to the diploma.
FAQ for OSSD Compulsory Courses and Rosedale Edu
How many compulsory courses does the OSSD require?
Eighteen of the thirty total credits are compulsory for students who entered Grade 9 in 2023 or earlier, with twelve optional credits completing the diploma.
Can compulsory credits be adjusted for individual students?
Yes. A principal may substitute up to three compulsory credits where a student’s needs justify it, following provincial rules, and each substitution appears on the Ontario Student Transcript.
Do international partner schools grant these credits themselves?
No. Under the Rosedale model, students register with Rosedale Global High School, an Ontario school inspected by the Ministry of Education, which grants the OSSD once all requirements are met.
What about students who join after Grade 9?
Rosedale applies Prior Learning Assessment and Recognition to award equivalent credits based on prior transcripts, easing the transition into the programme.
Who evaluates the courses?
Rosedale’s central team of Ontario Certified Teachers manages evaluation, supporting consistency, transparency, and academic integrity across every partner school.
Partner with Rosedale to Deliver the OSSD
Understanding the 18 compulsory credits is only the beginning. Turning them into a fully compliant, well-supported programme is where an experienced partner makes the difference. Rosedale centrally manages OSSD academic administration from its head office in Ontario, providing the curriculum, central evaluation, teacher training, and Ministry reporting that partner schools rely on, while local staff deliver instruction and day-to-day student support.
If you are a school owner ready to offer a globally recognised diploma, or a parent seeking a school that delivers the OSSD with genuine academic rigour, now is the time to act. Connect with Rosedale International Education to explore a partnership and bring the OSSD to your students.
