Graduation Requirements

Students must complete

  • 18 Compulsory credits
  • 12 Optional credits
  • 40 hours of community service

30 Credits


The Ontario Secondary School Literacy Test (OSSLT) is a compulsory standardized test for secondary school students in Ontario who wish to obtain the Ontario Secondary School Diploma. The OSSLT is written every year in March in all public, private and Catholic secondary schools in the province of Ontario.

Students who reside outside of Canada can take the test on the same day proctored at a local school or an exam center vouched by Keystone School.

Community Service

Every student must complete a minimum of 40 hours of community involvement activities as part of the requirements for an Ontario Secondary School Diploma (OSSD).

The purpose of the community involvement requirement is to encourage students to develop awareness and understanding of civic responsibility and of the role they can play and the contributions they can make in supporting and strengthening their communities.

Keystone Students in class

Students transferring from abroad or from other provinces

Students must complete all graduation requirements in Ontario to be eligible to graduate with an OSSD (Ontario Secondary School Diploma). The 30 credits are to be taken during the 4 years of high school, between grades 9 and 12. When a student transfers into Keystone School, all credits from previous schools will be assessed as per their transcript. Equivalencies will be granted based on their previous schooling.

For example: Sebastian applies to Keystone for grade 11. He has completed grade 9 & 10 in Mexico. Given that he has successfully passed the required courses in grades 9 & 10 in Mexico, he will get granted the equivalent credits in Ontario. Those equivalent courses will show as transfer credits in his transcript.