ISSUEhttps://pubs.nctm.org/view/journals/mt/112/3/mt.112.issue-3.xmlNovember 20182019-12-16https://pubs.nctm.org/view/journals/mtms/24/3/mtms.24.issue-3.xmlNovember 20182020-01-25https://pubs.nctm.org/view/journals/jrme/49/5/jrme.49.issue-5.xmlIssue 52020-06-24