There are baccalaureate schools in all cantons. The structure and time spent in high school education varies depending on the canton. To obtain the high school diploma, at least 12 years of primary, lower secondary and upper secondary school are required. Enrollment in a baccalaureate school usually occurs in grade 9 and lasts four years. In cantons where the baccalaureate cycle lasts three years (enrollment in the tenth year), preparatory training for the baccalaureate diploma must take place in the ninth year of lower secondary level. There are three types of admission into a Baccalaureate school: (1) Admission based on student's grade point average, (2) Admission based on student's grade point average and teacher recommendation from previous school. (3) Admission based on an entrance exam and/or the student's grades and/or previous school recommendation. Entrance exams are generally taken in written form. It should be noted that adults who wish to recover their baccalaureate degree can attend an adult baccalaureate school for three years. They must take the Swiss baccalaureate exam to officially complete this level of education and be eligible to progress to Tertiary (higher education)