A novel way to help young men growing up in communities in which concentrated poverty, violence and unemployment are well-documented barriers to health and longevity: male youth of color are trained to be the emergency response team to help stabilize street victims before doctors or nurses begin procedures.

Can we improve the methods we use to teach math in schools — so that everyone develops proficiency? A grade-school math program is changing how children learn based on the assumption that all children can achieve a high level of understanding.

Due to recent brain development research, educators are working to add more math education into pre-school and kindergarten classes. Studies show that children of this age are actually extremely receptive to numbers and learning geometry.

Clean water and healthy ecosystems are becoming increasingly difficult to come by. With floating islands and other inventions, eco-entrepreneur Bruce Kania thinks that biomimicry - such as reconstructing wetlands and growing biofilms - can tackle the toughest of water problems.

The highest hospital costs come from preventable emergency room visits. A doctor in Camden developed a home visit program which gives better and cheaper care.

According to the Centers for Disease Control and Prevention, drug overdoses are the leading cause of injury-related mortality. Naxolone, a drug used to revive overdose victims, is only available by prescription. However, private organizations have distributed Naxolone kits nationally, showing that the drug can save lives when it is more readily accessible.

PrePex, a new nonsurgical circumcision tool, could revolutionize the prevention of H.I.V. and AIDS in sub-Saharan Africa. Cheap and easy to assemble, the device has proven successful in several randomized trials.

The Jaipur Limb organization based in India has developed prostheses at low cost, and services are free for the poor. The organization’s efforts have recently spread to other countries with impoverished people. Jaipur Limb reaches patients through branch clinics, traveling workshops, and limb camps in cities around the world.

A prosthetist from Texas visiting Jaipur Limb workshops in Honduras saw problems with their low-cost prosthetics - the issue wasn't the design of the leg, but the technicians at the Honduras workshops were people completely new to prosthetics who were given just eight weeks of training. Thanks to his research, Jaipur established a research and development unit to improve the limb.

In the Renton School District, teachers found that only a very few fifth-graders could solve problems with the skill that, in other schools, was common in third or even second grade. So they turned math lessons into carefully guided conversations in which students explain their approaches, defend their reasoning and critique each other’s ideas.