Korina Smith, 18, of Saugatuck, Mich., a senior at Saugatuck High School, founded Teens For Humanity, a community service organization whose activities benefit poor and sick people in underdeveloped countries. A few years ago, Kori volunteered at orphanages, hospitals and missions overseas, and was so touched by her experiences that she wanted to show other teens that they could make a difference, too. “I wanted to give teens something positive to get involved in, so they would realize that they can affect someone’s life for the better,” said Kori, who put a lot of effort into promoting the organization by making school announcements and writing newspaper articles. Kori appointed a board and held weekly meetings, and eventually more than 100 teens joined. She also sought financial donations and contributions of supplies for the humanitarian visits she coordinated, which included trips to Brazil and Guatemala to feed the homeless, and deliver school supplies and Christmas gifts.