This research aims at examining and analyzing the potential that textbooks in the field of Languages and Communication provide in achieving the competence: student as a critical thinker. The data on the textbooks is collected according to the Delphi report, which is used as a standardized report in available published research on the development of critical thinking. The file extracted from this report is used as a research tool. In Kosovo, 85 Grade-5 students were involved as participants in the report as well, while the data was collected through a survey by the questionnaire for students utilized as a research tool. Mixed method was selected for research design since it includes both quantitative and qualitative research methods, while descriptive analysis method was also used during the textbooks review. The results obtained from the research indicate that the textbooks used by Kosovo students in elementary school which contain the highest potential for critical thinking development are Reading 5 and Exploring English 1, while the textbook that has the lowest potential for critical thinking, is Albanian Language 5. The most developed dimensions in these textbooks are Interpretation and Analysis, while the least developed dimensions are Assessment and Inference of knowledge.