Correct Response: D. Schema theory asserts that knowledge is organized and represented in one's mind in units called schemata, which include both contextual knowledge and language skills related to a concept. When teaching a new content lesson, an SEI teacher needs to be aware that English language learners may lack the conceptual knowledge required to make sense of a new lesson, or they may lack the language skills, or both. By reviewing relevant concepts and related language prior to a new lesson, the teacher in the scenario helps students build requisite schemata so that they can make connections between prior knowledge and the new information and concepts being introduced. A is incorrect because metacognitive development refers to thinking about one's thinking and learning processes. The strategies the teacher uses in this scenario are not metacognitive strategies. B is incorrect because the teacher creates the graphic organizer for use throughout the lesson, not simply to model how to make a graphic organizer. C is incorrect because, in this scenario, the teacher does not adapt or change the content but rather helps students connect the content to prior learning.