Pre-university
Primary education and secondary education combined are sometimes referred to as K-12 (Kindergarten through Grade 12). It should be noted that this structure can vary from school to school, and from province to province.. In contrast, Ontario is the only province which provides two levels of Kindergarten (Junior and Senior).
In Canada, secondary schooling, known as high school or collegiate institute or "école secondaire" or secondary school, differs depending on the province in which one resides. Additionally, grade structure may vary within a province and even within a school division. Education is compulsory up to the age of 16 in every province in Canada, except for Ontario and New Brunswick (where the compulsory ages are 18). Students may continue to attend high school until the ages of 19 to 21 (the cut-off age for high school varies between province). Those 19 and over may attend adult school. Also if high schoolers are expelled or suspended for a period of time over 2 months or so they could attend night school at the high school.
Ontario had a "Grade 13" known as Ontario Academic Credit (OAC) year, but this was abolished by the provincial government to cut costs. OAC was last offered for the 2002-2003 school year. As a result, the curriculum has been compacted, and the more difficult subjects, such as mathematics, are comparatively harder than before. However, the system is now approximately equivalent to what has been the case outside of Quebec and Ontario for many years. Secondary education in Quebec continues to Grade 11 (Secondary V), and is typically followed by college, a two-year pre-university (university for Quebecers is three years, except Engineering, Education, Medical, and Law), or three year vocational program taken after high school. (see Education in Quebec).
An increasing number of international students are attending pre-university courses at Canadian high schools.
Read more about this topic: Education In Canada