This digest examines the role metacognition can play in the teaching and learning of a second language. Understanding and controlling cognitive processes may be one of the most essential skills that classroom teachers can help second language learners develop. Rather than focus students' attention solely on learning the language, second language teachers can help students learn to think about what happens during the language learning process, which will lead to the development of stronger learning skills. The digest highlights a model of metacognition that is made up of five primary components: preparing and planning for learning, selecting and using learning strategies, monitoring strategy use, orchestrating various strategies, and evaluating strategy use and learning. Also discussed is the interaction of metacognitive skills. (VWL)