ISSUEhttps://pubs.nctm.org/view/journals/tcm/22/9/tcm.22.issue-9.xmlMay 20162020-01-25https://pubs.nctm.org/view/journals/mtms/21/9/mtms.21.issue-9.xmlMay 20162020-01-25https://pubs.nctm.org/view/journals/jrme/47/3/jrme.47.issue-3.xmlIssue 32020-06-24