This Viewpoint proposes a new perspective on why so many teachers leave the profession after only a very short time. While existing studies have largely focused on employment and working conditions, this essay argues that happiness is key to keeping new teachers in the workplace. Juxtaposing two fields that have heretofore been oblivious of one another (positive psychology; and teacher retention and development), it offers a pragmatic look at 10 strategies that might help to keep beginning teachers in the classroom.