The content of textbooks should be regulated on the basis of a specific context which shall be taught to a target group or region. This great duty is within the responsibility of the policymakers to establish specific organization for developing textbooks and improving communicative competence of English learners. This study could have pedagogical implications for the curriculum planners to revise, formalize or develop materials to help teachers how to introduce new concepts in the textbooks more productively and correctly. This study might encourage educational authorities and teaching educators to improve the quality of textbooks based on CLT principles.