Is it better for high school immigrants to go to Canada for preparatory courses or high school?

There is no such thing as a preparatory course in Canadian studies. The so-called preparatory courses are all fooled by the intermediary. The preparatory courses of Canadian universities are all ESL courses, which are a language course for those who meet the requirements of university application but have no language scores. In other so-called preparatory schools, all the courses taught are Canadian 12th grade courses, that is, senior three courses. After completing 6 credits in Grade 12, apply to the university through OUAC11. The preparatory course mentioned by the intermediary is the high school of an international school. So you read everything the same.