Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 板垣 芳雄 and ITAGAKI Yoshio,On miss-understanding or non-understanding of math. teaching in classes: from the presentations at the 38th meeting (2006) of Tohoku Society of Math. Ed.,東北数学教育学会年報,0910268X,東北数学教育学会,2007-03-31,,38,21-32,https://cir.nii.ac.jp/crid/1390853649582844800,https://doi.org/10.20569/00005045