David P. Ausubel developed subsumption theory which focuses on how meaningful information is learned from verbal presentations in educational settings. The primary process is subsumption, where new information is related to existing cognitive structures. There are several types of subsumption including subordinate learning, where new ideas extend or modify existing concepts, and superordinate learning, where established ideas become examples of a new overarching concept. In the classroom, subsumption theory can be applied by relating new concepts to prior knowledge through comparisons, allowing students to provide their own examples to demonstrate understanding, and giving advance organizers to help students integrate new information.