and 1 or 1.0% who was not a Swiss citizen. At the secondary level, students are divided according to performance. The secondary level begins at about age 12 and usually lasts 3 years. There were 59 teenagers who were in the advanced school, of which 38 or 64.4% were female, 2 or 3.4% were not Swiss citizens and 2 or 3.4% did not speak German natively. There were 43 teenagers who were in the standard school, of which 16 or 37.2% were female, 4 or 9.3% were not Swiss citizens and 3 or 7.0% did not speak German natively. The average class size for all classes at the secondary level was 17 students. References External links Municipalities of Thurgau Cultural property of national significance in Thurgau