Palestinian girls read the Koran at a camp in Gaza City, June 2012. In poor countries, boys are 20 percent more likely than girls to enroll in school, UNICEF says. Mahmud Hams/AFP/Getty Images hide caption

itoggle caption Mahmud Hams/AFP/Getty Images

Government workers exercise at their office in Mexico City, August 2013. To counter the obesity epidemic, the city requires all government employees to do at least 20 minutes of exercise each day. Tomas Bravo/Reuters /Landov hide caption

itoggle caption Tomas Bravo/Reuters /Landov

Yonta, 6, rests with her brother Leakhena, 4 months, under a mosquito bed net in the Pailin province of Cambodia, where deaths from malaria have decreased sharply in the past two decades. Paula Bronstein/Getty Images hide caption

itoggle caption Paula Bronstein/Getty Images

Almaz Acha sits with her baby Alentse at her home in the rural community of Sadoye, in southern Ethiopia. Families in rural communities, like this one, have benefited from Ethiopia's health extension program. Julien Behal/PA Photos /Landov hide caption

itoggle caption Julien Behal/PA Photos /Landov

A boy stands in the ruins of the leveled a neighborhood in Tacloban. Food and water supplies were almost nonexsistent in the days immediately after the storm. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

A polio worker vaccinates a child in Khyber-Pakhtunkhwa province, Pakistan, in October. Arshad Arbab/EPA/Landov hide caption

itoggle caption Arshad Arbab/EPA/Landov

Children get tested for malaria at a clinic near the Myanmar border in Sai Yoke, Thailand. Drug-resistant strains of the parasite have appeared in the region over the past few years. Surkree Sukplang/Reuters /Landov hide caption

itoggle caption Surkree Sukplang/Reuters /Landov

Former South African President Nelson Mandela, one of the world's most respected statesmen, died Thursday at 95. Denis Farrell/AP hide caption

itoggle caption Denis Farrell/AP

Filipino men stand in line to fill containers with gas in Tacloban, Philippines, on Sunday. The area experienced widespread gas shortages in the wake of Typhoon Haiyan. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

A Filipino woman prays at morning Mass at Santo Nino church, which was damaged by Typhoon Haiyan in Tacloban, Philippines, on Sunday. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Young students in a Bridge International Academy school in Nairobi, in September. On the surface, there's little to distinguish these schools from others in the developing world. But Bridge's model relies on teachers reading lessons from tablets. Frederic Courbet for NPR hide caption

itoggle caption Frederic Courbet for NPR

Military personnel from the U.S. and the Philippines unload relief goods at the Tacloban airport, Nov. 11, 2013. Some reports estimate that 10,000 people may have died in the city of Tacloban. Ted Aljibe/AFP/Getty Images hide caption

itoggle caption Ted Aljibe/AFP/Getty Images

A doctor vaccinates a child against polio at a health clinic in Damascus, Syria, on Nov. 6. To stop the disease from spreading beyond Syria, health officials plan to vaccinate 20 million children in the region. Youssef Badawi/EPA /LANDOV hide caption

itoggle caption Youssef Badawi/EPA /LANDOV