Canadian students have many chances to enter university, even if they don't do well in their high school studies. For example, a student who does not finish Grade 12 can still be admitted to university as a mature student, when they are at least 23 years old or older. And a student whose high school grades are too low for university, can first attend college, and then apply later on for university entrance. In Canada, colleges are very different academic institutions than universities. At college, students take job-related courses, they receive a diploma after two or three years of study, and they learn very practical skills. At university, students take a broad range of courses, they receive a Bachelor's degree after four years of study, and they learn theoretical knowledge and new ways of thinking. Canada's focus on student-centred education means that students can change their major, as well as transfer to a different college or university, if they want to. In fact, it is pretty much expected that most students will change their major at least once during their post-secondary education.