Textbooks are the significant means of communication and delivery of factual knowledge between writers and learners in the academic world. Text organization and discourse persuasion are essential concepts in academic contexts where the writers have to consider the academic audiences and their educational needs. So, Interactive metadiscourse signals, which refer to text organization markers, provide useful information about how writers support their arguments, and interactional metadiscourse signals which build up a relationship with readers in different contexts are crucial components in...