This study examines the actual level of the high school students’ meta-cognition in science learning. First, we created items to measure meta-cognition in high school students in science. Further, through a confirmatory factor analysis, which was performed targeting high school students (N=918), three factors, including meta-cognition knowledge, monitoring, and control, were confirmed as components of meta-cognition. In addition, using these items to measure the meta-cognition of high school students(N=399) in three courses with different science curricula, it was revealed that there were differences among the courses with regard to each of these three components of meta-cognition.