Prologue to the English Edition.- The Development of Vygotsky’s Thought: An Introduction.- Thinking and Speech.- Preface.- 1. The Problem and the Method of Investigation.- 2. The Problem of Speech and Thinking in Piaget’s Theory.- 3. Stern’s Theory of Speech Development.- 4. The Genetic Roots of Thinking and Speech.- 5. An Experimental Study of Concept Development.- 6. The Development of Scientific Concepts in Childhood.- 7. Thought and Word.- Lectures on Psychology.- Lecture 1. Peception and Its Development in Childhood.- Lecture 2. Memory and Its Development in Childhood.- Lecture 3. Thinking and Its Development in Childhood.- Lecture 4. Emotions and Their Development in Childhood.- Lecture 5. Imagination and Its Development in Childhood.- Lecture 6. The Problem of Will and Its Development in Childhood.- Afterword to the Russian Edition.- Notes to the Russian Edition.- Thinking and Speech.- Lectures on Psychology.- Notes to the English Edition.- Author Index.