This book is a compilation of theoretical and empirical advances related to the phenomenon of inner speech  in education, and is aimed at academics and researchers in the area of psychology, education and culture. Inner speech has been a focus of multidisciplinary interest. It is a long-standing phenomenon of study in philosophy, psychology, and anthropology. Researchers from different disciplines have turned their efforts to understand this inherent experience of being "talking to oneself". In psychology, Vygotsky managed to develop a complete description of the phenomenon, giving rise to a great line of research related to inner speech in the human experience. This book derives from an international research program, related to cultural psychology, socio-constructivism, developmental psychology and education. It opens the door for new debates and emerging ideas.