In PISA, school location refers to the community in which the school is located, such as a village, hamlet or rural area (fewer than 3 000 people), a small town (3 000 to about 15 000 people), a town (15 000 to about 100 000 people), a city (100 000 to about 1 000 000 people), close to the centre of a city with over 1 000 000 people or elsewhere in a city with over 1 000 000 people.