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One thing I have a bit of trouble with is understanding some of the school references.
There seems to be a large difference in terms and some are very confusing.
I will list off the ones for canada that I know(although there is some new ones being used which are mostly slang type in cities)
age 4 - preschool/daycare - for children of age 4 or younger stay most of the day and not much is really taught to children.
age 5 - kindergarden - children are in school for half a day. Learn to write names mostly.
age 6 - 8 children stay full school day and learn to read and write, basic math, history, local geography. Grades 1-3
age 9-11 - Elementary - learn more advance math, introduction to grammer, secondary language, physical education, history and geography of country. grades 4-6
age 12-14 - junior high - more advanced math, general sciences, history and world geography, dedicated classes for physical education and sports, sex education, social sciences, english and french classes heavy on grammer and other forms essays etc. peer pressure occurs. Grades 7-9
age 15-17 highschool- varies alot as children choose what their major will be and many other classes. English, seperate sciences, physical education that is seperated into team and non team sports. Much more peer pressure occurs and in many cases causes issues of legal nature. Grades 10-12
age 18 adult graduated from highschool supposed to be in workforce. May or may not skip directly to college and or university.
College or university - specialize and learn specific fields, ie medical science (doctor) engineering, chemistry, physics, (scientist) engineering, mechnical (engineer) and many many others.
If you could please list the ones for your country (if different) I am fairly sure others would appreciate it. Personally I did a search and didn't find anything specific or that was understandable.