This book provides a review of literature and discussion of theory and practice focuses on the value of linguistic interactivity (dialogism) in technology-based instruction, particularly in the fields of second language instruction and cross-cultural communication. The bulk of the document discusses theory concerning dialogue, dialogism, dialogicity, and aspects of computer-mediated communication and instruction, and draws conclusions about the relationship of dialogism, technology, and the teaching-learning process. A research project is then briefly reported, aimed at improving eighth-grade language students' metacognition concerning their computer literacy. (Contains 147 references.) (MSE)