Weightism involves stigmatization of individuals based on size, shape, or weight. Weight bias represents a form of bullying and is psychologically damaging to children and adolescents. Although weightism is reinforced by the media, family, and in schools, educators can play an important role in changing their class climate. This article described how teachers can address individual biases related to weight and size, create school policies against weight bias, and implement anti-weightism programs in order to effectively combat weight bias.