Most people migrate to the cities in the hope of finding work. But work is hard to find, and so renting a room in the slum is the nearest option.
Kibera is one of Africa's largest slums. About a million people live in the slum which is only 3 square kilometers in area.
Among them are children. For the many children in the slum, education offers their hope of a better future... so they desperately seek it.