For school owners evaluating an international diploma pathway, and for parents weighing where their child should study, one question comes up before all others: what does it actually take to graduate? The Ontario Secondary School Diploma, better known as the OSSD, is one of the most globally recognised secondary credentials available, yet the rules behind it are often misunderstood. This guide breaks down the OSSD requirements in plain terms, so that decision-makers on both sides of the desk can plan with confidence.
At its core, the OSSD is governed by three graduation pillars set by the Ontario Ministry of Education: a total of 30 credits, a provincial literacy requirement, and 40 hours of community involvement. Understanding how these fit together is the foundation of any successful OSSD program partnership.
The 30 Credit Breakdown: 18 Compulsory and 12 Elective
To earn the OSSD, a student must accumulate 30 credits across Grades 9 to 12. These are divided into 18 compulsory credits and 12 optional, or elective, credits. One credit is awarded for each course a student successfully completes, and a course is considered complete only when the student earns a minimum average of 50 percent. That single benchmark keeps the standard consistent for every learner, whether they study in Toronto or at an international partner school.
The 18 compulsory credits ensure a broad, balanced academic foundation. They cover the subject areas every graduate is expected to have studied, from English and mathematics to science and the arts. The remaining 12 elective credits are where the diploma becomes personal. Students choose these from the full range of courses their school offers, allowing them to build toward university admission goals, professional interests, or simply subjects they enjoy. This balance of structure and choice is one reason the OSSD requirements appeal to families seeking both rigour and flexibility.
Beyond the credit count, two further conditions must be met before a diploma is issued. The first is the provincial literacy requirement. Students demonstrate this by passing the Ontario Secondary School Literacy Test, known as the OSSLT, which is administered once a year through the Education Quality and Accountability Office. A student who does not pass the test may instead complete the Ontario Secondary School Literacy Course, the OLC4O, to satisfy the requirement. The course cannot be taken, however, until the student has first attempted the OSSLT.
The second condition is community involvement. Every student must plan and complete a minimum of 40 hours of eligible volunteer activity. The purpose is not merely to fill a quota. It is to help young people understand the roles they play in their community and to develop a genuine sense of belonging beyond the classroom. Together, these three pillars form the complete picture of the OSSD requirements.
Compulsory Credit Requirements by Subject Group
The 18 compulsory credits are distributed as follows. Students earn four credits in English, with one credit per grade, and three credits in mathematics, at least one of which must be taken in Grade 11 or Grade 12. Science accounts for two credits. Single credits are required in Canadian History, Canadian Geography, the Arts, Health and Physical Education, and a Secondary Language. Two half credits complete the core group: one in Career Studies and one in Civics.
Those subjects total 15 credits. The final three compulsory credits come from a group system designed to add breadth. Students select one additional credit from each of three defined groups:
- Group 1 includes additional English or Secondary Language courses, social sciences and the humanities, Canadian and world studies, guidance and career education, and cooperative education.
- Group 2 includes additional courses in Health and Physical Education, the Arts, business studies, and cooperative education.
- Group 3 includes additional courses in science at the Grade 11 or 12 level, computer studies, technological education, and cooperative education.
This structure guarantees that no graduate leaves with a narrow academic profile. Every student encounters languages, sciences, the arts, and civic education before selecting their electives. For school owners, it is worth noting that this framework is set by the Ontario Ministry of Education and administered centrally, which means the standard your students meet is identical to that of any Ontario high school graduate.
How Prior Learning and Transfer Credits Are Assessed
International students rarely begin their studies in Grade 9, and the OSSD accommodates this reality. Students admitted after Grade 9 are assessed through a formal process called Prior Learning Assessment and Recognition, or PLAR. Rather than requiring learners to repeat years of study they have already completed, PLAR evaluates their existing academic record and grants equivalent OSSD credits where the prior learning aligns with Ontario standards.
At Rosedale, this assessment is carried out by a dedicated counselling team, which reviews an entering student’s transcripts and determines how many credits can be recognised toward the diploma. The result is an efficient, fair pathway that respects the work a student has already done while ensuring the final credential meets the full OSSD requirements.
Alongside PLAR, incoming students complete an English language placement assessment. Because the OSSD is an academically demanding program delivered in English, this step confirms that a student is ready to succeed. Learners from non-native English backgrounds either take a placement test, which reports their level against the Common European Framework of Reference, or submit a recognised score from IELTS, TOEFL, Duolingo, or a Cambridge examination. Taken together, PLAR and the placement process give partner schools a clear, transparent method for enrolling students at the right level from day one.
FAQ for OSSD and Rosedale Edu
How many credits are needed to graduate with an OSSD?
A student needs 30 credits in total: 18 compulsory credits across required subject areas and 12 optional credits of the student’s choosing.
What is the passing grade for each course?
A minimum average of 50 percent earns one credit. The course and grade are then recorded on the Ontario Student Transcript.
Do students have to sit the literacy test?
Yes. Students must satisfy the provincial literacy requirement, normally by passing the OSSLT. Those who do not pass may complete the OLC4O literacy course instead, but only after attempting the test.
Are the 40 community involvement hours mandatory?
Yes. All students must complete at least 40 hours of eligible community involvement activities before graduating.
Can students transfer credits from a previous school?
Yes. Through Prior Learning Assessment and Recognition, students admitted after Grade 9 can receive equivalent OSSD credits for qualifying prior study, assessed by Rosedale’s counselling team.
Who grants the diploma?
Rosedale Global High School is inspected by the Ontario Ministry of Education and authorised to grant the OSSD. Students at international partner schools register with Rosedale and receive the diploma once every requirement is met.
Partner with Rosedale on the OSSD Program
The OSSD requirements are demanding by design, yet with the right academic partner, they are entirely achievable for your students. Rosedale Global High School centrally manages evaluation, transcripts, and diploma administration from its head office in Toronto, giving partner schools a globally respected credential without the burden of building an Ontario program from scratch.
If you own or lead a school and want to offer your students a world-recognised pathway to top universities, now is the time to explore a partnership. Contact the Rosedale team today to discuss how the OSSD program can be established at your school, and give your students a diploma that opens doors around the world.
