The purpose of the current study is to investigate post-basic English teachers` practice of critical thinking skills and the challenges they face while teaching skills in EFL classrooms. Three research questions were investigated to achieve this purpose: 1-To what extent do EFL teachers use classroom behaviors that nurture critical thinking at the post basic education schools? 2- Does EFL teachers’ practice of classroom behaviors that nurture critical thinking skills vary according to gender? 3-What challenges do EFL teachers face when incorporating critical thinking in their classrooms?

The sample was drawn from 12 post basic schools: 3 female schools, 3 male schools and 6 mixed gender schools. The total number of grade 11 and 12 English teachers in these schools is thirty: 15 males and 15 females. To accomplish the objectives and fulfill the purpose of the study, the study employed a questionnaire and an observation form to collect the data needed to answer the research questions. On looking at the post-basic EFL teachers’ use of behaviors nurturing critical thinking skills, the study reveals that post-basic English teachers rarely use the behaviors that nurture critical thinking skills. The findings also show no significant difference between males and females in the use of the behaviors that most nurture critical thinking skills, except for one type of behavior. Moreover, the study results report some challenges that EFL teachers face when teaching critical thinking; these are related to the course book, to extra-curricular activities, to class size and to training.