This book explores the place of consciousness in second language learning. It offers extensive background information on theories of consciousness and provides a detailed consideration of both the nature of consciousness and the cognitive context in which it appears. It presents the established Modular Online Growth and Use of Language (MOGUL) framework and explains the place of consciousness within this framework to enable a cognitively conceptualised understanding of consciousness in second language learning. It then applies this framework to fundamental concerns of second language acquisition, those of perception and memory, looking at how second language representations come to exist in the mind and what happens to these representations once they have been established (memory consolidation and restructuring).