Kara Nelson, a fourth-grade teacher at Logan Elementary School, was watching “The Oprah Winfrey Show” one day. On the show was a segment about a program called “Challenge Day” – a day when teenagers, parents and teachers challenged each other to do better, not necessarily in scholastic sense, but by being more accepting, kinder and more supportive of one another. “I took some of that program and made it for elementary level,” said Nelson, who’s in her second year of teaching fourth grade at Logan. “It’s a program that Logan has created.”