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.
We highlight five kids and teens who are making a difference through volunteer opportunities, proving that helping hands can be child-sized too.
After Hurricane Katrina, Channa Mae Cook cofounded Sojourner Truth, a charter school with an emphasis on community service and social justice issues, to help lift up New Orleans' embattled school system.
Librarian Cynthia Dobrez uses e-readers, bibliotherapy, and her own intuition in her middle school library in Michigan.
Through project Roca (Spanish for 'rock') Mary Baldwin reaches out to teenagers in Massachusetts to keep them off the streets and out of jail.
Using a message of love, Kim Hae Sung provides legal counseling, language training, and schools to help foreigners fit into a tight-knit society in South Korea.
In Philadelphia, Jane Golden oversees the Mural Arts Program, which gets citizens involved in painting over graffiti while celebrating their history and culture.
For four decades Iain Douglas-Hamilton has been an advocate for elephants, the endangered giants of Africa.
Orchestra leader Marcus Tsutakawa and jazz band conductor Clarence Acox inspire music students at Seattle's Garfield High School.
When park ranger Leanne Sarco saw oil-covered hermit crabs on the Louisiana beaches, she started her own project to clean and save them.
Douglas Coe has founded the Bulls and Bears summer camp, where kids can try being a stock analyst – and learn how to handle their own finances too.
His training program in Vietnam pulls poor youths off the streets and sends them into good jobs at hotels and restaurants.