My 3 most salient organizations.

1. Africa Educational Trust http://www.africaeducationaltrust.org/
2. UNESCO Project to Fight Against Human Trafficking in Africa http://www.unesco.org/shs/humantrafficking
3. CNN Africa http://www.cnn.com/WORLD/africa/archive/

With 1, I would like to work to improve the quality of Educational System.
With 2, I would like to work to prohibit and prevent the children from Human Trafficking.
With 3, I would like them to raise a public awareness through out the world.

http://www.irinnews.org/report.aspx?ReportId=76411
This is the resource which talks about the issue.