The question is not:
Can we use critical thinking to teach vocabulary?
The question is:
How can we teach enough vocabulary without it?
Critical thinking is defined as a higher order process of reasoning that allows a student to move beyond an individual an individual viewpoint, to question assumptions, and to deeply analyze a range of complex information issues and problems. Teaching the elements of critical thinking is important in modern education, as it provides learners with the ability to deal efficiently and successfully with the changes of the new technology world. To cultivate such competency, learners must go beyond focusing on textbook knowledge and develop the necessary cognitive skills to make valued judgements, rational arguments, and evaluations.There should be exposure to teaching and learning of critical thinking during the process of learning L2. Once critical thinking is integrated into the ongoing education process learners will be more successful in thinking critically in the second language.Teachers should train students in choosing the appropriate strategies that best suit their language needs. In addition teachers should design useful activities for students to improve their vocabulary.
In this regard i believe that traditional teaching methods need to be replaced by the learner-centered approaches in order to develop students' critical thinking ability.