Students are required to meet the provincial literacy requirement in order to earn an Ontario Secondary School Diploma.

Students who have been eligible to write the OSSLT at least twice, and were unsuccessful at least once, are eligible to take the Ontario Secondary School Literacy Course to fulfill the literacy requirement.

This test is scheduled and administered by the Education Quality and Accountability Office (EQAO) once each year, usually at the end of March or the beginning of April. Students will usually take the OSSLT in Grade 10, unless a deferral is granted by the principal. Students who do not successfully complete the OSSLT will have the opportunity to retake the test in subsequent years. Once students have successfully completed the OSSLT, they may not retake it.

Green Road High School (GRHS) can organize the test administration for students whose Ontario Student Record (OSR) is held at GRHS. The test can be written at the GRHS office in Thornhill, Ontario, where students will be invigilated by a GRHS staff member.

The fee for writing the test at GRHS is $100. The fee for writing the test at an alternative location is $499.