In 2014, the Centers for Disease Control and Prevention and the United States Department of Education released the first federal uniform definition of bullying to help clarify instances of bullying from other occurrences. At the crux of the definition is unwanted aggressive behavior, observed or perceived power imbalance and repetition of behaviors or high likelihood of repetition. Bullying modes and types can vary. The two modes of bullying include direct (bullying that occurs in the presence of a targeted youth) and indirect (bullying not directly communicated to a targeted youth such as spreading rumors). In addition to these two modes, the four types of bullying are included in broad categories in the current definition: physical, verbal, relational (efforts to harm the reputation or relationships of the targeted youth), and damage to property. Bullying may constitute criminal behavior and be punishable by law. According to the National Center for Education Statistics, 28 percent of American students in grades six to 12 have experienced bullying.