The present research seeks to study the position of rationality and its components in the curriculum of senior high school in the eyes of the teachers of Sanandaj by emphasizing on Islamic teachings. A descriptive-survey research is used. The statistical population includes all the teachers (male and female) of the senior high schools in Sanandaj. The sample includes 145 teachers who were chosen randomly in such a way that all teachers had a fair chance in the choice. In addition to the library sources, a researcher-made questionnaire was used to assess teacher’s views. Also, two descriptive methods: (percent, frequency, mean, graph and standard deviation) and analytical statistics (t-test) were used to analyze the data. The research findings show that, according to teachers' views, the amount of attention given to rationality in designing the curriculum of the senior high schools is above the mean in such areas, like: thinking, contemplation, moderation and temperance, and below the mean in the areas of vision and position of science, knowledge and innovation in curriculum.