Adaptation is needed simply to make the materials more tailored to the needs of the learners or the particular teaching context. There are several ways of adapting the textbooks. The first one is adding which means putting in more materials while taking into account of time allocation. We can add by either extending or expanding. The former is done when we supply within the same framework or following a similar model in the textbook. The latter is done when we develop a new task or adding a new skill practice.

The second way is deleting or omitting. Deletion can also happen at two levels: the first is to simply subtract the current material by reducing the amount; the second is by abridging the current material or dropping it out completely.

The third way is modifying. It again involves two kinds. One is called rewriting, the other is called restructuring. Rewriting can be applied to any aspect of the content in a textbook. Restructuring mainly refers to the management of activities or tasks according to the context of your own teaching. If your class is too big for a board game introduced in the textbook, you may want to restructure the activity by making it into team work.

The forth way is simplification. Simplification is one type of modification. It is mainly applied to texts, often to reading passages.

The last one is reordering. This refers to changing the order of the tasks in a unit or changing the order of units in a course book. The latter in particular can be difficult to do since the change may result in changes in the order of presentations of grammatical structures or vocabulary which are planned to be sequenced for learning.