Abstract
This study proposes interdisciplinary project-based learning (PBL) utilizing a "Project Learning Design Sheet." A cross-curricular PBL program is then proposed in which the junior high school technology and home economics class "Bio-nurturing Technology," the science classes "Various living Organisms and Their Similarities" and "Structures and Functions of The Bodies of Living Organisms," and the mathematics class "Data Application" are linked. To design the cross-curricular project learning, we coordinated the collaboration of the subject teachers and the timing of the study contents, and set "fixed and native species" as the study material. The examination of the practical learning effects, in which we focused on the transformation of learners, suggested that such approach could contribute to concept formation and the consolidation of individual knowledge. In addition, interviews with teachers revealed that while they confirmed the application of perspectives and ways of thinking in their subjects, they also perceived challenges regarding the acquisition of knowledge and skills.