Earn Your Ontario Secondary School Diploma (OSSD) Online
Ministry-Inspected Ontario School
100% Flexible Online Learning
Personalized Academic Support
University-Focused Pathways
A Trusted Online High School in Ontario
Ontario International School (OIS) is a Ministry-inspected online high school in Ontario, offering students in Canada and around the world flexible pathways to earn Ontario Secondary School Diploma (OSSD) credits and complete their diploma requirements online.
Students may choose OIS for university preparation, credit recovery, flexible scheduling, international study, or other personalized academic pathways.
Ministry Inspected School
Ontario International School (OIS) undergoes regular inspections by the Ontario Ministry of Education. These inspections ensure that instruction in OSSD credit courses meets Ontario curriculum, assessment, and evaluation requirements.
Official BSID: 881793
Ontario International School is registered with the Ontario Ministry of Education under BSID 881793. As a Ministry-inspected private high school, OIS is authorized to grant credits toward the Ontario Secondary School Diploma (OSSD).
Globally Recognized OSSD
The Ontario Secondary School Diploma (OSSD) is a respected Canadian secondary school credential that supports postsecondary pathways in Canada and internationally. Canada consistently performs above the OECD average in international student assessments.
Why Choose OIS
Ontario International School combines flexible online learning, personalized academic support, and Ontario Secondary School Diploma (OSSD) pathways designed around each student’s goals. Explore what makes the OIS learning experience different.

Earn Your OSSD Online
Complete Ontario secondary school credits online through a flexible pathway designed around your academic goals.

Learn Anytime, Anywhere
Access your online courses from anywhere and study on a schedule that works for you.

48-Hour Grading & Feedback
Receive timely grading and feedback to help you understand your progress and keep moving forward.

Personalized Academic Support
Receive support from experienced educators and academic advisors. Access live office hours and chat with OIS's highly qualified teachers.

Flexible Year-Round Enrolment
Start your studies throughout the year and progress according to your individual academic plan.

Interactive Online Learning
Interact with teachers and classmates through course discussion areas, collaborative activities, and ongoing online academic support.

Strategic Success Caoching
Every student receives a personalized academic roadmap designed around their goals, current academic standing, and the admission requirements of their intended university or program.

Credit Transfer & PLAR
Have previous learning and eligible credits reviewed to determine how they may contribute toward your OSSD requirements.

Personalized University Pathway Planning
Build an academic pathway based on your goals, previous credits, and postsecondary admission requirements.
Programs Designed for Diverse Student Goals
Choose the OSSD pathway that fits your academic background, current needs, and future goals.
Full OSSD Diploma
Complete your Ontario Secondary School Diploma (OSSD) online through a personalized pathway based on your previous education, credits, and academic goals.
Individual OSSD Courses
Take individual Ontario high school credit courses online to earn required credits, complete prerequisites, or strengthen your academic pathway.
International Students
Earn Ontario high school credits online from outside Canada and work toward an OSSD through a pathway tailored to your educational background and future goals.
Credit Transfer & PLAR
Have your previous education and eligible prior learning assessed to determine which OSSD requirements may already be fulfilled.
Credit Recovery
Get back on track by completing the credits you need through a flexible online learning pathway with academic support.
University Preparation
Plan your OSSD courses and prerequisites around the admission requirements of the postsecondary programs you want to pursue.
Your Pathway to Top Universities
OIS helps students prepare for postsecondary education in Canada and internationally through Ontario Secondary School Diploma (OSSD) courses, personalized academic guidance, and flexible online learning. Students can plan their courses around the admission requirements of their intended university or program.







The Ontario Secondary School Diploma (OSSD) supports postsecondary pathways in Canada and internationally. OIS helps students select appropriate courses and plan their academic pathway based on the admission requirements of their intended university or program.
Meet Our Expert Faculty
Ontario International School’s experienced educators support students through personalized online instruction, academic guidance, and engaging learning experiences. Our teaching team brings expertise across science, mathematics, business, English, and other OSSD subject areas, helping students build the knowledge and skills needed for academic success.
Dr. Mehak Mussawar
Mathematics & Science Teacher
Dedicated to helping students build confidence in mathematics and science through structured instruction, academic support, and interactive learning experiences.
Dr. Sobia Arshad
Biology, Chemistry & Physics Teacher
Helping students build strong scientific knowledge through engaging and inquiry-based learning.
Mohammed Shah
Business Studies Teacher
Guiding students in developing business knowledge, critical thinking, and leadership skills through practical and real-world learning applications.
Anna Faisal
Science Teacher
Passionate about helping students strengthen their scientific inquiry, critical thinking, and academic confidence in a supportive online learning environment.
Veronica Khusial
English Teacher
Supporting students in developing strong communication, literacy, and critical thinking skills.
Ahmed Abdullah
Mathematics, Science & Geography Teacher
Supporting students in developing analytical thinking, scientific understanding, and problem-solving skills through engaging and student-focused online learning.
Students Success Stories
Hear from OIS students about their experiences with flexible online learning, academic support, and working toward their education and university goals.
My journey at Ontario International School has been such a positive and rewarding experience. Even though the classes are online, I’ve always felt connected, supported, and part of a real school community. The teachers are caring, dedicated, and always available to help.

Amal Atamaz Alsibai
University Preparation
I had a great experience at OIS. The teachers supported me throughout the whole course, and everything was explained clearly and understandably. I learned a lot and felt comfortable during my studies.

Arsenii Chashchin
OSSD Student
Before joining OIS, I struggled in regular classrooms and found it difficult to stay focused during lessons. At OIS, I discovered that I learn much better in a flexible environment where I can focus and participate more. OIS has helped me grow academically and personally.

Mohammad Khalil Hussien
OSSD Student
Based on my experience, I truly appreciate my journey at this school. It has helped me acquire important skills and feel prepared to start my university journey. The comprehensive curriculum has helped me progress effectively.

Rami Sharab
OSSD Student
My journey at OIS has been a truly rewarding experience. While the curriculum is academically challenging, I always felt supported because the teachers were consistently there to ensure we understood every concept thoroughly. Overall, I am very happy with my time here and grateful for the guidance I received.

Hajar Elayane
International Credit Transfer
My experience at Ontario International School was very pleasant. The school environment is positive and supportive, and the teachers are always ready to help. The courses are well organized and easy to understand, and the flexible learning environment made it easier to stay motivated and manage my studies effectively.
Hala Canoe
University Preparation
Start Your OSSD Journey
01 — Book a Consultation
Discuss your goals, academic background, and OSSD pathway options.
02 — Submit Your Information
Provide your academic information and available transcripts or supporting documents.
03 — Academic Assessment & Course Planning
Receive a personalized OSSD pathway and recommended course plan.
04 — Enroll & Start Learning
Complete registration and begin your online courses with ongoing academic support.
Frequently Asked Questions (FAQ)
The Ontario Secondary School Diploma (OSSD) is Ontario’s official secondary school diploma and can be used when applying to postsecondary institutions. Admission requirements vary by university, country, program, and institution, so students should confirm the specific requirements of the institutions they plan to apply to.
Yes. Students can take individual Grade 12 OSSD courses to complete prerequisites or other credits needed for postsecondary applications. The specific courses and grades required depend on the university and program, so students should check the admission requirements for their intended program.
After you submit your academic information and available transcripts, the OIS team reviews your previous education, completed credits, and academic goals. You will then receive guidance on your remaining OSSD requirements and recommended academic pathway.
Yes. OIS offers online OSSD credit courses to students studying from outside Canada. Depending on a student’s previous education and remaining graduation requirements, they may work toward individual Ontario secondary school credits or completion of the OSSD through OIS.
Ontario policy recognizes online OSSD credit courses, and inspected private schools can grant credits toward the OSSD when authorized to do so.
Ontario International School is a Ministry-inspected private school with BSID 881793. The Ontario Ministry of Education inspects private high schools that seek authority to grant credits toward the Ontario Secondary School Diploma (OSSD). These inspections focus on the standard of instruction in OSSD credit courses, including curriculum requirements and assessment and evaluation practices.
Yes. Students may take OSSD credit courses through an inspected private school while attending another school. Ontario policy specifically confirms that students registered in publicly funded schools may concurrently earn credits through an inspected private school.
OIS reviews a student’s previous academic records to determine how prior learning may apply toward OSSD requirements. For students transferring from outside Ontario or other eligible educational settings, prior learning may be assessed through Ontario’s Prior Learning Assessment and Recognition (PLAR) process, including equivalency assessment where applicable.
Assessments are completed online and may include assignments, projects, tests, examinations, and other forms of evaluation depending on the course. Students receive course-specific instructions and academic support throughout their studies.
OIS teachers provide grading and academic feedback within 48 business hours of submission, helping students understand their progress and continue moving through their coursework.
Yes. Eligible students can work toward completing the Ontario Secondary School Diploma (OSSD) through authorized online OSSD credit courses. The requirements a student must complete depend on factors such as when they entered the Ontario secondary school system, previously earned credits, and their individual academic history.
The OSSD requires a minimum of 30 credits, along with the applicable literacy, community involvement, online-learning, and financial-literacy graduation requirements. Specific requirements may vary depending on a student’s cohort and academic history.
Start Your OSSD Journey Today
Take the next step toward your academic goals with a personalized OSSD pathway designed around your previous education, remaining requirements, and future plans.
Request a Free OSSD AssessmentBook a Free Consultation