idealist.org

Global Humanitarian Expeditions is an international volunteer organization based in the United States. We send volunteers to Nepal, India, Bhutan, Cambodia, Vietnam, Tanzania, and The Dominican Republic where they have the chance to help local people while being immersed in another culture.
GHE is a 501(c)3 nonprofit organization without religious affiliation. We work in partnership with nonprofit organizations, orphanages, and schools around the world.
Volunteer opportunities last for two-three weeks where volunteers have the opportunity to work diectly with local people to provide dental care, health care, education and community development aimed to preserve autonomy and improve quality of life for indigenous peoples.