The Ontario Curriculum is the backbone of K–12 education for millions of students across Canada's most populous province — and understanding it is one of the most important things you can do as a parent navigating school choices. Whether your child is entering Grade 9 or you're planning ahead from the primary years, the curriculum shapes what your child learns, how they're assessed, and what doors open for them after graduation. This guide breaks down exactly how the Ontario Curriculum works, what the Ontario Secondary School Diploma (OSSD) requires, and how private schools in Ontario use — and often enhance — this provincial framework.
The Ontario Curriculum is a set of provincially mandated learning expectations developed by the Ontario Ministry of Education. It defines what students from Kindergarten through Grade 12 are expected to know and be able to do at each grade level across all subject areas, from mathematics and language arts to science, the arts, and physical education. The curriculum is organized into specific expectations — broad overall expectations and more detailed specific expectations — that teachers use to plan instruction and assessment.
Unlike some other provinces, Ontario's curriculum is remarkably detailed and publicly available. Parents can download the full curriculum documents for any subject directly from the Ministry of Education website, which means you can see exactly what your child's teacher is expected to cover in any given year. This transparency is one of the curriculum's genuine strengths.
The curriculum applies to all publicly funded schools in Ontario, including public, Catholic, and French-language boards. Importantly, it also applies to the vast majority of registered private schools in the province. According to NextSchool data, 674 out of 1,173 active private schools in Canada are aligned with or supplement the Ontario Curriculum, making it by far the most influential provincial framework in Canadian private education.
"The Ontario Curriculum sets a high bar for student achievement and is recognized internationally as a rigorous, well-structured framework — one reason Ontario graduates are competitive applicants at universities around the world."
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At the heart of the Ontario secondary school system is the credit system. A credit is earned when a student successfully completes a course that has been approved for credit by the Ministry of Education. Each credit course typically represents 110 hours of instructional time, though some courses can be delivered in compressed or extended formats.
To earn the Ontario Secondary School Diploma (OSSD), students must accumulate a total of 30 credits — 18 compulsory credits and 12 optional credits. This structure gives students meaningful flexibility while ensuring they develop a well-rounded foundation across core subject areas. The 18 compulsory credits cover English (4 credits), mathematics (3 credits), science (2 credits), Canadian history, Canadian geography, the arts, health and physical education, French as a second language, and a civics and career studies course.
Beyond credits, students must also complete 40 hours of community involvement activities and successfully pass the Ontario Secondary School Literacy Test (OSSLT). The literacy test is typically written in Grade 10 and assesses reading and writing skills that students are expected to have developed by that point. Students who do not pass can take the Ontario Secondary School Literacy Course (OSSLC) as an alternative pathway.
Private schools in Ontario follow the same credit system, which means an OSSD earned at a private school carries the same weight as one from a public school when applying to Ontario universities and colleges. This equivalency is a significant advantage for families considering the private school route.
One of the most distinctive features of the Ontario Curriculum at the secondary level is its course pathway system. Starting in Grade 9, most academic subjects are offered at different levels of intensity and focus, allowing students to chart a course that aligns with their post-secondary goals. Understanding these pathways early can make a significant difference in your child's options after high school.
There are four main course types in the Ontario secondary curriculum. Academic courses are designed for students planning to attend university, emphasizing theory and abstract thinking. Applied courses focus more on practical applications and are suited for students heading toward college or apprenticeship programs. Open courses are available to all students regardless of their intended destination and are common in subjects like the arts, physical education, and some technology areas. At the Grade 11 and 12 level, University/College (M), University (U), College (C), Workplace (E), and Open (O) designations replace the Grade 9–10 academic/applied split.
It's worth noting that pathway decisions made in Grade 9 are not permanent. Students can transfer between pathways, though some transfers require prerequisite courses. Many private schools in Ontario offer guidance counselling that specifically helps families understand these transitions and plan a four-year high school course selection strategy.
| Course Type | Destination | Focus | Grade Level |
|---|---|---|---|
| Academic | University | Theory & abstract thinking | Grades 9–10 |
| Applied | College / Apprenticeship | Practical applications | Grades 9–10 |
| University (U) | University | Advanced theory | Grades 11–12 |
| College (C) | College / Trades | Applied skills | Grades 11–12 |
| Workplace (E) | Direct employment | Real-world readiness | Grades 11–12 |
| Open (O) | All destinations | Broad enrichment | Grades 9–12 |
"Choosing between academic and applied pathways in Grade 9 is one of the most consequential decisions a student makes — but it's also one of the most reversible, with the right guidance and planning."
Registered private schools in Ontario are required to teach the Ontario Curriculum if they want their graduates to receive an OSSD — and most do. However, the way they deliver that curriculum can vary enormously, and this is where private education often distinguishes itself most powerfully.
Many private schools use the Ontario Curriculum as a floor, not a ceiling. They meet all provincial requirements while layering on additional programming that enriches the student experience. This might include accelerated pacing for gifted learners, deeper exploration of subjects through project-based learning, integration of international frameworks like the International Baccalaureate (IB) or Advanced Placement (AP) programs alongside Ontario credits, or specialized streams in STEM, the arts, or leadership.
Private schools also tend to offer smaller class sizes, which allows teachers to differentiate instruction more effectively within the curriculum framework. In a class of 15 rather than 30, a teacher can spend more time ensuring each student genuinely masters the specific expectations rather than simply covering them. For students with learning differences, many private schools offer modified or alternative curriculum approaches that still lead to recognized credentials.
The average annual tuition at Ontario-aligned private schools is $23,372 CAD, according to NextSchool data, though the range is dramatic — from as low as $1 to as high as $183,000 CAD annually. This wide range reflects the diversity of private school models, from small faith-based schools with minimal fees to elite boarding institutions with comprehensive residential programming.
| Feature | Public School | Private School (Ontario Curriculum) |
|---|---|---|
| OSSD granted | Yes | Yes (if registered) |
| Class size (avg.) | 25–30 students | 10–20 students |
| Enrichment programs | Limited | Often extensive |
| IB / AP available | Select schools | Many private schools |
| Tuition cost | Free | $1–$183,000/year |
| Specialized streams | Rare | Common |
| Guidance counselling | Standard | Often enhanced |
While the Ontario Curriculum is specific to Ontario, its influence extends across Canada because of the province's size and the concentration of private schools in its major urban centres. Toronto alone is home to 152 private schools that align with or supplement the Ontario Curriculum, making it the undisputed hub of Ontario-curriculum private education in Canada. Mississauga adds another 42 schools, and Scarborough contributes 27 schools, meaning the Greater Toronto Area accounts for a remarkable concentration of options.
Perhaps more surprising to some parents is the presence of Ontario Curriculum schools in Alberta. Calgary has 69 Ontario-aligned private schools and Edmonton has 34 — a reflection of the mobile Canadian workforce and the demand from families who have relocated from Ontario and want continuity in their children's education. These schools allow students to continue working toward an OSSD even while living outside Ontario, which can be valuable for families who anticipate returning to the province or who want their children to apply to Ontario universities.
British Columbia, Quebec, and other provinces have their own robust curriculum frameworks, but Ontario's is unique in its national reach through the private school sector. For families in provinces like Manitoba or Saskatchewan who want access to an Ontario-recognized credential, private schools following the Ontario Curriculum can be a genuine option worth exploring.
When evaluating any school that claims to follow the Ontario Curriculum, parents should confirm that the school is registered with the Ontario Ministry of Education (or has an equivalent recognition arrangement), that teachers are qualified to grant credits, and that the school's principal is authorized to issue the OSSD. These are non-negotiable markers of legitimacy.
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Not all Ontario Curriculum private schools are created equal. Beyond the baseline requirement that the school is registered and authorized to grant credits, parents should consider several additional factors when evaluating options.
First, look at course breadth and elective options. The compulsory credits are fixed, but the 12 optional credits give students significant freedom. A school with a wide elective catalogue — from computer science and entrepreneurship to visual arts and world languages — gives students more opportunity to explore interests and build a compelling university application. Schools with fewer than 20 distinct course offerings may limit your child's ability to customize their pathway.
Second, consider post-secondary outcomes. Ask schools for data on where their graduates go after high school. Reputable private schools track this information and are happy to share it. University acceptance rates, scholarship recipients, and the range of programs graduates enter are all meaningful indicators of how well the school prepares students within the Ontario Curriculum framework.
Third, examine assessment and reporting practices. The Ontario Curriculum uses a four-level achievement scale (Level 1 through Level 4, with Level 3 representing the provincial standard). How a school communicates student progress against these levels — and how teachers use assessment data to adjust instruction — says a great deal about the quality of education being delivered.
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Finding the right Ontario Curriculum school for your child is genuinely complex — there are hundreds of options across Ontario and beyond, each with different strengths, philosophies, tuition structures, and program offerings. NextSchool's school directory is built specifically to help Canadian parents cut through that complexity with real, verified data.
Our database includes detailed profiles for Ontario Curriculum private schools in Toronto, Mississauga, Scarborough, Calgary, Edmonton, and dozens of other cities. Each profile includes tuition information, grade levels served, curriculum details, program specializations, and contact information — everything you need to build a shortlist and start meaningful conversations with schools.
You can filter by city, tuition range, grade level, and program type to find schools that match your family's specific priorities. Whether you're looking for an academically rigorous university-prep environment, a school with a strong arts or STEM focus, a faith-based community, or a school that specializes in supporting students with learning differences, NextSchool's directory surfaces the options that matter most to you. With 674 Ontario-aligned schools in our database, the right fit is out there — and we're here to help you find it.
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