The aim of this study is to analyze and find out space utilizations around classrooms with open-space from actual classes in elementary schools. Sometimes pupils sit on the floor and sometimes are at their desk during classes. The results of this study are summarized as follows : 1) Behavior settings of classes were defined as combination of five factors, i.e. activities, unit of class, pupil's aggregate configurations, pupils' number and spaces. 2) We classified classes by the transitions of pupil's aggregate configurations and spaces. We found the basic pattern of transitions of learning program. 3) Finally, we grasped space utilizations around the classrooms in the case of classes with sitting-on-the-floor-activities.