Not completing high school as a teenager does not prevent someone from earning a diploma later. Adults in Toronto can return to school, receive credit for previous education and life experience, complete missing courses or pursue a high school equivalency credential.
The right pathway depends on what you have already completed and what you want to do next. Someone applying to university may need particular Grade 12 courses, while another adult may need only proof of secondary-level education for employment.
Before enrolling in a program, have your previous education assessed and determine exactly which credential or prerequisite you need.
Start With Your Education Goal
Completing high school is not always the only solution. Your goal should determine whether you need a complete Ontario Secondary School Diploma, individual high school credits or another form of academic upgrading.
You may want to:
- Qualify for a job requiring secondary school completion
- Apply to an Ontario college
- Meet university admission prerequisites
- Enter an apprenticeship
- Upgrade mathematics, science or English
- Complete a diploma you started years ago
- Have education completed outside Canada assessed
- Prepare for a different career
Contact the employer, college, university or apprenticeship program before registering for courses. Ask which credential and specific subjects it accepts.
A program may require Grade 12 English, mathematics or science even if it does not require applicants to hold a complete OSSD. In that situation, completing a few prerequisites could be faster than pursuing an entire diploma.
What Is an Ontario Secondary School Diploma?
The Ontario Secondary School Diploma, commonly called an OSSD, is the standard high school diploma awarded in Ontario.
It normally requires 30 credits along with literacy, community-involvement and other graduation requirements. The precise combination of compulsory and optional credits can depend on when the student entered the Ontario secondary school system.
Adult learners should not try to calculate their requirements using a general online checklist. A school should review their transcript, age, previous education and applicable graduation rules before creating an academic plan.
The Government of Ontario’s adult high school diploma guidance provides an overview of available pathways.
Who Is Considered a Mature Student?
Ontario generally defines a mature student for Prior Learning Assessment and Recognition purposes as someone who is at least 18 years old and is returning to secondary school after being out of the system for a specified period.
Individual Toronto programs can have different admission structures. Some full-time adult day schools primarily serve students aged 21 and older, while continuing-education courses may be available to younger adults who meet the applicable requirements.
People between 18 and 20 should not assume that they are too old for high school or too young for adult education. Contact the appropriate school board and explain your age, current status and educational history.
Begin With a Transcript Assessment
Your previous transcript is the starting point for determining what remains incomplete.
If you attended an Ontario secondary school, request an official Ontario Student Transcript from the school or board responsible for maintaining your records. Ontario school boards retain student records for many years, so a transcript may still be available even if you left school a long time ago.
If you attended school outside Ontario or outside Canada, collect official transcripts, report cards, course descriptions and graduation documents. Documents not written in English or French may require an acceptable translation.
Do not enrol in courses based only on your memory of what you completed. A formal assessment may reveal that you need fewer—or different—credits than expected.
How PLAR Can Reduce the Number of Courses
Prior Learning Assessment and Recognition, or PLAR, allows eligible students to receive Ontario high school credits for learning acquired outside a traditional secondary school.
That learning might come from:
- Previous schooling
- Employment
- Workplace training
- Volunteer experience
- Independent study
- Language knowledge
- Personal responsibilities
- Education completed in another country
PLAR is an assessment process, not an automatic award based on age or years of work. A school may review documents, interview the learner or use assessments to determine whether previous learning meets Ontario curriculum expectations.
According to the TDSB’s adult high school information, an eligible mature student may receive as many as 26 of the 30 credits required for an OSSD through PLAR. At least four senior credits must still be completed through formal education.
Receiving the maximum is not guaranteed. The number awarded depends on the learner’s education, experience and assessment results.
Do Foreign High School Credits Count?
Education completed in another country may be evaluated for equivalent Ontario credits.
Bring as much official information as possible, including transcripts, certificates, course descriptions and documents showing the years or levels completed. A record containing only final grades may not explain the length or content of each course.
The assessment may not convert every foreign subject into an identically named Ontario course. Its purpose is to determine how previous learning fits Ontario’s graduation framework.
Newcomers should distinguish secondary-school assessment from professional or postsecondary credential recognition. Our guide to getting foreign credentials recognized in Ontario explains the separate process that may apply to university degrees, professional education and regulated occupations.
Adult High Schools in Toronto
The Toronto District School Board operates adult learning centres where eligible students can earn OSSD credits, prepare for college or university and receive help developing an academic plan.
The City Adult Learning Centre, for example, serves adult students pursuing a diploma, compulsory credits or prerequisites for postsecondary education. Other TDSB adult schools serve different parts of Toronto.
Course availability varies by location and academic term. A school near your home may not offer every subject you need, so compare schedules before registering.
Adult schools commonly organize courses into shorter terms or quadmesters. This can allow students to focus on fewer subjects at a time, but the pace may be intensive.
TCDSB Adult and Continuing Education
The Toronto Catholic District School Board also provides adult and continuing-education opportunities. Depending on the term, options may include full-time, part-time, evening, weekend or online learning.
Its adult education information can help learners review current programs and contact the board about eligibility.
Do not assume a course will be offered every semester. Night-school and summer-school selections often change according to enrolment, staffing and demand.
Confirm whether the program accepts adult learners, whether prerequisites apply and whether the course leads to an OSSD credit.
Day School, Night School or Online Learning
The best format depends on work, childcare, transportation and learning preferences.
Adult day school can provide a regular schedule, direct access to teachers and more structured support. It may be appropriate for someone able to make education a primary daytime commitment.
Night school can suit adults working during the day, although attending long evening classes after work can be demanding. Course selection may also be more limited than at a full-time adult school.
Online learning offers flexibility but requires reliable internet access, time management and independent study. Confirm whether lessons are live at scheduled times or completed independently.
A course advertised as online is not necessarily self-paced. Students may still have attendance requirements, assignment deadlines and scheduled examinations.
Completing Only the Prerequisites You Need
Adults who already hold a diploma may return to complete specific Grade 11 or 12 courses required for a new program.
For example, someone applying to nursing, engineering or technology may need senior mathematics or science courses that were not included in their original education. Another learner may need a higher Grade 12 English mark.
Ask the college or university for the exact course code and minimum grade. “Grade 12 math” is not sufficiently specific because Ontario offers different courses designed for university, college and workplace pathways.
Completing the wrong mathematics or science course can delay an application by an entire admission cycle.
OSSD Versus the CAEC
Adults may also encounter the Canadian Adult Education Credential, or CAEC. It replaced the Canadian GED testing program and provides a high school equivalency credential to eligible adults who pass assessments in several subject areas.
The CAEC is not the same as an Ontario Secondary School Diploma. An OSSD is earned through credits and provincial graduation requirements, while the CAEC is based on equivalency testing.
The Ontario CAEC information page explains current eligibility, testing and registration requirements.
Before selecting the CAEC, ask the intended employer, college, university or apprenticeship program whether it will accept the credential. Some opportunities may accept high school equivalency, while others require particular OSSD courses and grades.
Choose based on the requirement you must satisfy—not simply which option appears faster.
Can Adults Earn a Diploma for Free?
Publicly funded adult-credit programs may be available without tuition to eligible learners. However, additional expenses can still arise.
Possible costs include transportation, childcare, internet service, textbooks, supplies, transcript requests or document translations. Losing work hours to attend class can also be a significant indirect cost.
Ask the school for a complete explanation of charges before registering. Do not assume a private online high school is necessary simply because you need a flexible schedule.
Toronto residents seeking employment-related education can also explore free job-training programs in Toronto. Those programs serve a different purpose from an OSSD but may be useful after graduation or while planning a career direction.
Be Careful With Private High School Programs
Private schools can offer legitimate credit courses, but adults should verify the school and course before paying.
Ask whether the school is authorized to grant OSSD credits, how instruction is delivered, how student identity is verified and whether the course code satisfies your intended admission requirement.
Review:
- The complete tuition and additional fees
- Withdrawal and refund rules
- Expected course duration
- Teacher availability
- Examination procedures
- Transcript delivery
- Prerequisite requirements
- Whether the final credit appears on an official transcript
Be cautious of guarantees that everyone will finish quickly or receive a particular grade. A recognized credit must involve assessment against Ontario curriculum expectations.
If you are considering a separate employment credential after high school, our article about evaluating a Toronto career certificate explains how to assess recognition, cost and employment value.
Documents to Gather Before Registration
Contact the school first because documentation requirements vary. Adults commonly need identification, proof of address or status, and records of previous education.
Try to gather your official transcripts, report cards, diploma documents, immigration identification where applicable and certified translations before the registration period begins.
If records from another country are unavailable, tell the school. Staff may explain whether assessment, PLAR or alternative evidence can be used. Do not purchase unofficial replacement transcripts or alter an existing document.
How Long Will Completing High School Take?
There is no universal completion time.
An adult who needs one prerequisite might finish within a term. Someone who receives substantial PLAR credit may need only the senior credits that must be completed formally. Another learner with limited previous secondary education could require a longer program.
Timing also depends on course availability. Even when only a few credits remain, they may not all be offered during the same term.
Ask the school to prepare an education plan showing:
- Credits already recognized
- Credits still required
- Additional graduation requirements
- When each required course is offered
- Prerequisites that must be completed first
- A realistic target graduation date
Treat an estimate as a plan rather than a guarantee. Work, health, family responsibilities and course scheduling may affect progress.
Applying to College or University
Completing an OSSD does not automatically qualify someone for every postsecondary program.
Colleges and universities evaluate applicants according to program-specific prerequisites, grades and other admission criteria. Competitive programs may require marks considerably higher than the formal minimum.
Tell the adult school which program you intend to enter. Staff can help identify the appropriate course level, but applicants should also verify the requirements directly with the institution.
Pay attention to application deadlines. A required course may need to appear as completed or in progress when the application is reviewed.
Returning to School Is Not Starting Over
Adult learners often worry that returning to high school means repeating everything they studied as teenagers. In practice, transcript evaluation and PLAR may recognize a substantial amount of previous learning.
The first step is not registering for a random course. It is having your academic history reviewed and connecting the remaining requirements to a clear employment, apprenticeship, college or university goal.
Toronto offers adult day schools, continuing education, night classes, online learning and equivalency options. The best route is the one that produces the credential or prerequisite you actually need while fitting realistically around work and family responsibilities.
Note: Adult-education eligibility, OSSD requirements, course schedules and fees can change. Confirm current information directly with the Government of Ontario and the relevant Toronto school board before registering or paying for a program.