Millennium Development Goal 2: Achieve universal primary education
Target: Ensure that all boys and girls complete a full course of primary education

One in six children of secondary school age attends primary school because they started school late or had to repeat grades. These children are effectively occupying places that could accommodate children of primary school age currently out of school. This underlines that inefficiencies within the whole education system need addressing.
Source: UNICEF, Progress For Children: A Child Survival Report Card, November 6, 2007.