<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:ifp="http://www.ifactory.com/press" ifp-element-xpath="/*[local-name() = 'urlset' and namespace-uri() = 'http://www.sitemaps.org/schemas/sitemap/0.9']"><ifp:contentType>ARTICLE</ifp:contentType><sm:url xmlns:sm="http://www.sitemaps.org/schemas/sitemap/0.9"><sm:loc>https://pubs.nctm.org/view/journals/mt/112/6/article-p406.xml</sm:loc><ifp:title>Letters to the editor</ifp:title><sm:lastmod>2019-12-16</sm:lastmod></sm:url><sm:url xmlns:sm="http://www.sitemaps.org/schemas/sitemap/0.9"><sm:loc>https://pubs.nctm.org/view/journals/mt/112/6/article-p406.pdf</sm:loc><sm:lastmod>2021-06-14</sm:lastmod><ifp:title>Letters to the editor</ifp:title></sm:url><sm:url xmlns:sm="http://www.sitemaps.org/schemas/sitemap/0.9"><sm:loc>https://pubs.nctm.org/view/journals/mt/112/6/article-p404.xml</sm:loc><ifp:title>Mathematical Misconceptions</ifp:title><sm:lastmod>2019-12-16</sm:lastmod></sm:url><sm:url 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