Abstract
I intended to point out the essentials for designing the open-space of elementary school through the investigation study works at the seven typical open-plan schools. In this paper I tried to extract and adduce the typical informal style of learning activities in open-space. These are classified as follows. 1) each class's independent usage of open-space as a media-center. 2) team-teaching activities undertaken as one body of whole of grade through the dissolution of classes. 3) individual learning activities by each pupil through the dissolution of grade or classes, that is to say, non-grade individual learning. I introduced these actual development of informal learning activities and mentioned about the methodology for the designing of open-space of elementary school through the analysis of these activities.