parts. In the first part, learners study the LCT concept using visual materials that describe the life cycle environmental impacts of pro-environmental behaviors, such as local production for local consumption and reuse tableware. In the second part, learners calculate the life cycle energy of their own belongings using the dedicated LCA software named 'Energy Consumption in Your Bag?!' . These learning materials can be downloaded from the website prepared for the e-learning. Approximately 500 high-school third graders studied using this self-directed e-learning program, individually during the summer break. Their teachers' role was to provide students with the follow-up quizzes to confirm what they had learned. The result of the selfassessment survey conducted after the e-learning showed that more than half of the learners became concerned about LCA. Moreover, there was the tendency that their concern to environmental problems was higher than that of the previous third graders in the same school. Furthermore, we analyzed the learners' impression statements written after the e-learning, and found that the learners who began to be concerned about LCA tended to describe more about their daily lives in their impression statements than those who were not or less interested in LCA did.

Synopsis:The perspective of life cycle thinking (LCT) is expected to become increasingly important in the global agreement to create a sustainable society. This article reports the example of e-learning method of environmental education that incorporates LCT as high school student's homework. The specialized contents, that individual learners download from the website, are prepared by NPO, whereas the school gives their students the learning task and study instruction. In this manner, it was shown that e-learning is one of the solution to implement environmental education for a large number of students without significantly increasing the preparations and burdens of teachers. Moreover, its educational effects, such as perception of LCT concept or more environmentally responsible consumption, could be expected. On the other hand, since the IT infrastructures of students vary, it is necessary to provide technical trouble shooting and support.