In this research we diagnosed the actual status of the 7th National science elective curriculum and suggested away to select and organize the content of the new science elective curriculum. The first science education reform wassecond science education reform suggested alternative interpretations of students opportunity to learn, putting a brake onthe structuralist thinking. According to the survey result, the majority of the science elective courses are in need forrevision because the contents are overcrowded, too difficult in light of students learning readiness, failed to drawstudents interest in science, and are overlapped and repeated among the 10th grade science, high school science I and II.In particular, Earth Science II and physics I are the most unfavorable courses among students. Thus, we recommended afundamental change be made in the new curriculum in addition to the optimization of the content. In this paper, wesuggested topic-centered content organization for the science elective course I, i.e., Physics I, Chemistry I, Biology I andEarth Science I that is designed for both science track and non-science track students. Since curiculum provides studentswith an opportunity to learn, a curriculum study should focus on what the opportunity to learn is that students oughtschool elective curriculum.......... curriculum, poststructuralism, structuralism, optimization of content, topic-centered, need-to-know. . : . ..... ... .... .... ... ... .... . 7. ... .... ..... .. ... .... , .. ... ... .... ..... .. .. ... ..... . . 1. .... ... ...