An untouched chalkboard from 1917 was found behind a classroom wall at Emerson High School in Oklahoma City. Jacob McCleland/KGOU hide caption

itoggle caption Jacob McCleland/KGOU

Students from a Harlem Children's Zone school visit Hunter College in New York. College visits are one way schools encourage students to attend college after graduation; now, a growing number of schools are working to help students succeed in college as well. Courtesy of Harlem Children's Zone hide caption

itoggle caption Courtesy of Harlem Children's Zone

After years as punk rockers, Jeneda (right) and Clayson Benally formed the band Sihasin, which means "hope" in Navajo. "We have every possibility to make positive change," says Jeneda. Courtesy of Sihasin hide caption

itoggle caption Courtesy of Sihasin

Fadzai Kundishora (left) can no longer go to school because her family can't afford the fees. She spends days at home with her grandmother Miriam Kundishora, doing chores. Ofeibia Quist-Arcton/NPR hide caption

itoggle caption Ofeibia Quist-Arcton/NPR

Striking French teachers hold a German flag as they take part in a nationwide protest against new measures aimed at revamping the country's school system, in Marseille, France, on May 19. France's 840,000 teachers are largely opposed to the reform, their unions say, fearing it will increase competition between schools and exacerbate inequalities. Jean-Paul Pelissier/Reuters/Landov hide caption

itoggle caption Jean-Paul Pelissier/Reuters/Landov

A group of mothers and infants celebrate a recent graduation from the Harlem Children's Zone Baby College program. Marty Lipp/Courtesy of Harlem Children's Zone hide caption

itoggle caption Marty Lipp/Courtesy of Harlem Children's Zone

At Montana's Nkwusm Salish Language School, teacher Echo Brown works with a student learning Salish words. Luk means "wood" or "stick." Picct means "leaf" and solsi translates to "fire." Courtesy of Nkwusm Salish Language School hide caption

itoggle caption Courtesy of Nkwusm Salish Language School

Safeena Husain says: "I educate girls." Her efforts have brought 80,000 Indian girls into school; last week she received a Skoll Award for Social Entrepreneurship (above). Courtesy of Skoll Foundation/Gabriel Diamond hide caption

itoggle caption Courtesy of Skoll Foundation/Gabriel Diamond