Canada has 12 years (some provinces are 10 years) of free compulsory education, also known as compulsory education, which means that children aged 6 (grade 1) to 18 (grade 12) (some provinces are up to 16, grade 10) must receive education. Ontario provides free early childhood education for children aged 4 and 5, but not compulsory education. 4 or 5 years old children can choose to go or not to go to kindergarten class (4 years old, JK: Junior Kindergarten) or big class (5 years old, SK: Senior Kindergarten), or half day school half a day at home.<br>Interestingly, Canadian provinces have different grades in primary, junior and senior high schools, and even slightly different in English. For example, primary schools can be called elementary or primary school, and junior high school is middle school, intermediate, junior secondary, or junior high school. The common name of high school is high school, also known as senior secondary school or senior high school.<br>In Ontario, Quebec, Alberta, there are several other provinces. Primary schools are defined as grades 1 to 6, 7 and 8 as junior high schools, and 9 to 12 grades as high schools. In the BC British Province, the kindergarten is divided into grade 3 (primary), or we call it primary school, and grades 4 to 8 belong to the intermediate school year (intermediate), or the school system that we know is called junior middle school, and the 9 to 12 grades are high schools (secondary). (Columbia) In addition, many schools in Canada have grades 1 to 8, which do not clearly distinguish the names of primary and secondary schools, but are generally referred to as elementary school, which includes 9 to 12 grades, called secondary school.<br>
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