The Direct Method is an approach to teaching foreign languages that uses the target language exclusively and avoids translation or explaining grammar rules. It was developed in the 1860s based on observations of how children acquire their first language. Key principles include using real-world examples and demonstrations rather than explanations, emphasizing oral skills and questions/answers, and avoiding grammar explanations. Techniques include reading aloud, conversations, dictation, and map tasks. While it aims to mimic natural language acquisition, critics argue it is difficult to implement fully and may not be suitable for large classes.