Curriculum design comprises not only creating language courses and course materials but also selecting texts and other teaching resources and adapting changes to pre-existing courses. There has been an ongoing debate concerning the role of course books in language courses and how to equip teachers with a sensible approach to adopting and adapting course books. Despite this, practically all debates conclude that course books will be beneficial if they are in touch with the present state of learners' knowledge (Graves, 2000). As a result, teachers should pay attention to these variables in curriculum design and be familiar with the technique. A flexible approach is essential, as is selecting a course book. However, modifying and incorporating a textbook into a curriculum is a more difficult task than it appears, as it entails supporting and mentoring not only teachers but also students in curriculum creation.