The Frayer Model is a vocabulary development tool. In contrast with a straight definition, the model helps to develop a better understanding of complex concepts by having students identify not just what something is, but what something is not. The center of the diagram shows the concept being defined, while the quadrants around the concept are used for providing the details. Words that work well with the Frayer Model include quadrilaterals, insects and democracies. We have included two variations of the model that we have seen used in school settings.