| Computer-Assisted Language Learning (CALL) is a relatively new and rapidly evolving academic field that explores the role of information and communication technologies in language learning and teaching. It provides fertile ground for leading edge, innovative, and highly creative thinking and scholarly work. Recently, though, computers have become so widespread in schools and homes, and their uses have expanded so dramatically that the majority of language teachers must now begin to think about the implications of computers for language learning. Because of the multiplicities and changeability of the field, which include the emergence of new theoretical, methodological, and learning paradigms, special understanding and expertise is required to assess the quality and depth of such scholarly activities. This thesis has been written for the following three purposes: (a) a clearer understanding of CALL and its activities; (b) suggested approaches to the organization of CALL activities and (c) a systematic evaluation on CALL.To have a better and complete understanding of CALL, the thesis first reviews the history and nature of the subject, which will help us comprehend what our predecessors have done in this field; what theorieshave been applied; and what problems still remain unsolved. Then following the general review of CALL, the thesis lists the three main forms of CALL activities to review the contemporary situation of this new subject. In the main body of the paper, by summarizing the features and advantages of the subject, the thesis tries to demonstrate the necessity of CALL; and then according to three different standards, the thesis tries to summarize approaches to the organization of CALL activities appropriately. The last part of the paper is the evaluation of CALL activity (including software programs evaluation), which, the author believes, will be of great help to language teachers and learners who plan to introduce CALL to their teaching and studies.
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