Critical-thinking skills (CTS) understanding, and measuring skills rather than rote learning. Educators unanimously agree that, CTS can be taught using different teaching methods including concept mapping, critical questioning workshops, and systematic literature reviews and to problem based learning (PBL). PBL is a student-centered, task-based instructional method in which the teacher serves as a facilitator. The paper adapted a library based work; the data were collected using textbooks, journals articles and internet search. The literatures reveal that; PBL is the best approach to build CTS, integrating it into all areas of learnings and to the