Ontario Online High School Credits.
Start in 24 Hours.
OES is a Ministry-inspected Ontario online high school (BSID #667186) offering Grade 9–12 online high school courses taught by Ontario Certified Teachers, with free 24/7 tutoring and proctored exams online.
10,000+ Students enrolled at Ontario eSecondary School since 2017
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Your success,
backed by real results
Supportive teachers, high-achieving students, and a trusted learning experience.
“I was able to complete my courses and earn my OSSD at my own pace, right from home. OES gave me the flexibility to learn on my schedule.”
98%
of our students
find OES teachers to be responsive and supportive
10,000+
students
served since 2017
85%
of our students
earn honour roll marks
One course fee. Everything included.
No fixed class time, and nothing extra to buy — your fee covers the teacher, the tutoring, the materials and the final exam.
Start Within
24 Hours
No semesters, no waiting. Enroll today, take up to 12 months, finish at your own pace.
Teacher + 24/7 Tutoring Included
An Ontario Certified Teacher marks your work and gives personal feedback, with free on-demand tutoring anytime.
A Credit Universities & Colleges Recognize
Ministry-inspected OSSD credits your home school and school board accept — recognized by universities and colleges in Canada and worldwide.
Exams Proctored Online, Free
Write your final from home. Ministry-approved proctoring is bundled into every course fee.
Plans change? Switch to a different course free within your first 7 days.
Popular Online High School Courses
Supported by Ontario Certified Teachers
Take the Next Step—Book Your Guidance Appointment
Connect with our experts for personalized advice and start your journey today
Book a Free 15-Min Guidance Call
In 2026 Our Students Have Been Accepted By
Online High School for Every Kind of Student
No matter where you are on your educational journey (OES) provides the flexibility and support you need to succeed.
The Mark You Need for the Program You Want
OES is a Ministry-inspected Ontario online high school (BSID #667186) where you can start any course today and finish in as little as 4 weeks — or take up to 12 months. Students use OES to raise a mark before university applications, recover a missed credit, or fast-track a course their school couldn’t timetable. Every course is taught by an Ontario Certified Teacher, includes free 24/7 tutoring, and ends with a proctored final exam — so your credits already meet Ontario’s new 2026–27 exam standards. Fully recognized by universities and colleges across Canada.
Finish Your Diploma — or Just Fill the Gaps
Not every adult learner needs a full diploma. Many mature students come to OES for a single prerequisite — the Grade 12 English, math, or science a college or university program requires — or to upgrade a mark and change career paths. Others are finishing their OSSD, and often faster than expected: through the Ministry’s PLAR process, we can grant up to 16 Grade 9–10 credits and up to 10 senior credits for your prior education, work, and training, leaving as few as 4 courses to graduate. Because OES is 100% online and self-paced, it works as an adult high school for students in Ottawa, Toronto, Mississauga, Brampton, London, Hamilton and anywhere in Ontario — no commute, no night classes, and built around a job and a family. Our guidance team maps your shortest route before you spend a dollar.
A Canadian Diploma From Anywhere in the World
From the Gulf to South Asia, Hong Kong to Europe, students in 50+ countries earn their OSSD with OES as their pathway to Canadian universities — no study permit required, because everything is fully online. Courses run on your schedule, not Toronto’s: free 24/7 tutoring means real support in your hours, and students switch from British, American, or IB systems at any point in the year. Your existing credits are assessed first through a formal equivalency evaluation, so you know exactly where you stand before you enroll. Proctored final exams are written online from home, included in the fee.
Skip CEGEP — Go Straight to University
Quebec students can move from Secondaire 5 directly to university by completing Grade 12 OSSD credits online with OES — a one-year, Ministry-inspected alternative to two years of CEGEP. Study 100% online from anywhere in Quebec, on your own pace, with Ontario Certified Teachers and 24/7 tutoring included. Our credits are recognized by universities across Canada, so you can apply a full year sooner. OES also supports Quebec families seeking a structured virtual homeschooling alternative for Grades 9–12.
One Course. One Goal. No Strings Attached.
Continuing Education at OES is built for students who need a single course, not a diploma. Repeat a course you didn’t pass the first time, upgrade a mark that’s holding back your application, or switch pathways — like moving from a college-level to a university-level credit. Our dedicated Upgrade courses carry a focused workload designed for students who’ve already seen the material, so you can retake ENG4U, MHF4U, MCV4U, and other high-demand credits efficiently. Enrollment is open 365 days a year: start today, finish in as little as 4 weeks, and put your best mark forward.
Get Credit for What You’ve Already Learned
PLAR is the Ontario Ministry of Education’s formal process for converting your prior education — completed in Canada or abroad, with or without documents — into OSSD credits. As a Ministry-inspected school, OES evaluates your transcripts, credentials, training, and experience, then tells you exactly how many of the 30 diploma credits you’ve already earned and which courses remain. Many adult students discover they’re far closer to graduating than they thought. The equivalency assessment includes an Ontario Student Record set up in our office and a clear, personalized path to your diploma.
Flexible Learning, Real Results
Real students, real success—see how OES’s flexible learning and expert support helped them achieve their goals.
All of my teachers and staff were so helpful and kind.
Stephanie Spinn
Studying at Ontario eSecondary School was great for me! All of my teachers and staff were so helpful and kind. Thanks to Ontario eSecondary School, I was able to complete my high school diploma in a way that worked perfectly for me!
The prerequisite course I needed for nursing school was super easy to learn.
Brianna Logan
I had a great experience using OES for a prerequisite course I needed to attend nursing school. I found it super easy to learn and use the LMS. I highly recommend and if I need U level courses in the future I will definitely get them through OES.
I can pick and choose when I want to work.
Hakan Leonard
Great course, I’ve learned lots and got my necessary credits for college now. I love how I can pick and choose when I want to work and decide when my deadlines are since that’s the most stressful part of traditional schooling for me.
Online High School in Ontario: Quick Answers
The questions students, parents and adult learners ask us most about earning OSSD credits online.
Yes. Ontario eSecondary School (OES) is a Ministry-inspected private online high school in Ontario (BSID #667186) with authority to grant Ontario Secondary School Diploma (OSSD) credits. Our credits count exactly like credits from any Ontario public or private school and are recognized by universities and colleges across Canada. You can confirm our standing on the Ontario Ministry of Education’s register of private schools or read our Ministry inspection letter.
Yes. Adults of any age can earn their Ontario high school diploma (OSSD) online with OES, from Ottawa, Toronto, London or anywhere in Ontario. Courses are 100% online and self-paced, with no fixed class times, so they fit around a job and a family. Many mature students only need one or two courses, such as a Grade 12 English or math prerequisite for college or university. Through PLAR, OES can also grant credits for prior education and work experience, so some adults graduate with as few as 4 courses.
Prior Learning Assessment and Recognition (PLAR) is the Ontario Ministry of Education’s process for turning education, training and work experience you already have into OSSD credits. For mature students, OES can grant up to 16 Grade 9–10 credits and up to 10 Grade 11–12 credits through PLAR, which means up to 26 of the 30 credits needed to graduate. The assessment reviews your transcripts, credentials and experience, from Canada or abroad, and gives you a written plan showing exactly which courses remain.
Yes. OES offers every Grade 12 university-preparation course online, including Advanced Functions (MHF4U), Calculus and Vectors (MCV4U), Data Management (MDM4U), English (ENG4U), Chemistry (SCH4U), Biology (SBI4U) and Physics (SPH4U). Each course is taught and marked by an Ontario Certified Teacher, includes free 24/7 tutoring, and ends with a proctored final exam written online. Start any day and finish in as little as 4 weeks.
Yes. OES offers dedicated Upgrade courses for students who have already taken a course and want a higher mark, including ENG4U, MHF4U, MCV4U and other high-demand credits. Your new mark is added to your Ontario transcript; for Grade 11 and 12 courses both attempts appear, and most Ontario universities use the higher mark when evaluating your application. Upgrade courses carry a focused workload for students who have already seen the material.
Yes. After Secondaire 5, Quebec students can complete Grade 12 OSSD credits online with OES and apply directly to university, a one-year alternative to two years of CEGEP. Courses are 100% online, taught by Ontario Certified Teachers, include 24/7 tutoring, and are recognized by universities across Canada, including in Quebec.
You can complete an online high school course at OES in as little as 4 weeks, and you have up to 12 months. Enrollment is open 365 days a year with no semester start dates or fixed class times, so you can start within 24 hours of registering and set your own pace. See how it works.
Each OES course is a single flat fee of $595 CAD per credit for Canadian students ($895 for international students), with nothing extra to buy. The fee includes the Ontario Certified Teacher, all course materials, free 24/7 tutoring and the online proctored final exam. Enrol in two or more courses and $100 is taken off each course automatically at checkout.
Every OES course ends with a final exam written online from home under live supervision, at a time you book, with no travel and no extra fee. Because proctored finals are built into every course, OES already meets Ontario’s exam requirements that took effect September 1, 2026, with no change needed on your part.
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