The function of education is to teach one to think intensively and to think critically.

Critical thinking defined as the ability to think about your own thinking with a more analytical perspective, has long been an important side of education history. Recently there has been much attention devoted to this concept, particularly in the domain of language education. The present study is a review of the literature and previous studies done on the issue of critical thinking. In the first section an introduction to the study is presented. In the next section, the definitions of the notion of critical thinking from different scholars are put forth. In the third part, we discussed the features and characteristics of a real critical thinker. In the fourth part, the idea of teachability of critical thinking is discussed. It is tried to present some strategies which can enhance critical thinking in students