Scientist David Carroll doesn't publish academic papers but tells turtles' stories through his art and writings.
Muoy You has opened Seametrey Children's Village in Phnom Penh to help restore Cambodia's culture.
Cle Ross is turning an eyesore in Kansas City, Kan., back into a baseball park to get urban kids off the streets and teach life lessons.
Her brother's death inspired a foundation that supports an orphanage in the Philippines
Dominic Deng Diing, who escaped the violence in Sudan, raises funds to help schoolchildren there.
Around the world children are forced to serve in military groups or as laborers or worse. UNICEF's Ironside has set some of them free.
Homero Aridjis, one of Mexico's top environmentalists and poets, has led the battle to save the habitat of monarch butterflies, Pacific gray whales, and sea turtles.
A plucky British ex-pat in Pattaya, Thailand, saw kids playing in the dirt while parents worked at a construction site. So, she set up day-care centers and orphanages for needy children.
A celebrity gym owner in Rio de Janeiro teaches martial arts to entice kids from the favelas to stay in school.
Bob Hentzen is walking nearly 8,000 miles across Latin America to find sponsors for needy kids and the elderly.
Hilton Kelley balances fighting air pollution with job creation and talking with chemical and oil companies in Port Arthur, Texas.
Volunteering abroad between high school and college in a 'Global Citizen Year' helps students learn teamwork and leadership skills
'Shoestring philanthropist' Gold pairs tiny but powerful donations with acts of kindness
Pakistan's low-income families can buy inexpensive health-care insurance through his Nava Jeevan (New Life) program.
A visit to Poland gave David Shirkey an idea to become a one-man charity, giving the poor and disabled a wheelchair or prosthetic limb.
An after-school program in Chester, Pa., gives at-risk teenagers a music education – and much more
Cori Wegener is trying to save Haiti's treasures in a kind of Doctors Without Borders effort to preserve its "soul."
Photojournalist Pewee Flomoku captured images of child soldiers and the other horrors of war in Liberia. Now he's working on free and fair elections.
Sasha Alyson hauls (sometimes by elephant) children's books in the local language to kids in rural Laos eager to learn to read.
Laurie Marker cuts down thorn bushes and gets farmers to change from herding dogs to guard dogs to protect cheetahs.
As southern Sudan heads toward independence, Driuni Jakani works to promote peace, small farming, and the rights of women.
John Connell teaches skills from the circus, like juggling, to street kids in Bolivia. They earn money and go to school more.
Nobel laureate Wangari Maathai, who founded the Green Belt Movement, says spiritual values are the key to healing ourselves and our environment.
As a teen Haley Kilpatrick felt the sting of school bullying herself. She started the youth program 'Girl Talk' to stand up to it.