http://www.schoolsanitation.org/Why/index.html

"When a school lacks access to a basic water supply and sanitation facilities and its students have poor hygiene habits, the incidence of major childhood illnesses among its students will increase. This will adversely affect school children's participation, lowering enrollment rates and increasing absenteeism, poor classroom performance, and early school dropout. It will also decrease learning capacity as measured in educational performance, outcomes, and productivity."

http://web.worldbank.org/WBSITE/EXTERNAL/TOPICS/EXTWAT/0,,contentMDK:217...

"More than 1.1 billion people lack access to safe water, and 2.6 billion lack access to basic sanitation. The Millennium Development Goals (MDGs) include a target to halve the fraction of the world’s population without access to water and sanitation by 2015."

Couldn't new schools serve as a community center, with access to clean water and sanitary conditions? This would not only be a practical way to meet the UN's Millennium Development Goals, but would have the added advantage of allowing more children to have an education AND of keeping them focused, healthy, and in school.