This book is an exploration of the relationship between one teacher’s beliefs about teaching English as a second language and her classroom practice. It shows how the teacher’s beliefs play out in the classroom setting. It highlights the teacher’s beliefs about language, language teaching and learning, use of mother tongue, errors and error correction. It further uncovers the other factors like school policy, working experience and personal learning experiences which also impact practice. It concludes by maintaining that teaching is an extremely complex activity and it is not always possible to link belief to practice. It is, nevertheless, vital to study the teachers’ beliefs as any professional development activities teachers engage in must consider the teachers’ beliefs as teachers always view new learning through their own belief lens. Hence, focus on teachers’ beliefs is an important component for the success of professional development activities which educational institutions engage in.