@article{oai:teapot.lib.ocha.ac.jp:02000031,
 author = {河合, 紗由利 and KAWAI, Sayuri},
 journal = {研究紀要, Bulletin in School Education},
 month = {Feb},
 pages = {1--11},
 title = {式の意味を考える―多角形の内角の和を求める授業を通して―},
 volume = {28},
 year = {2021}
}