Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) FUJIKAWA Yoshinori and HAYASHI Takehiro,A Study on the Characteristics of Identifying Cardinal Direction in the Introductory Stages of Elementary School Science Curriculum,The Bulletin of Japanese Curriculum Research and Development,02880334,Japan Curriculum Research and Development Association,2015,37,4,63-72,https://cir.nii.ac.jp/crid/1390283659846232704,https://doi.org/10.18993/jcrdajp.37.4_63