\u201cI think I know what \u2018PM\u2019 means, it maybe means \u2018prepare for midnight!\u2019\u201d <\/p>\n\n\n\n
2nd Grade Mathematicians are learning all about time. Reading an analog clock at positions of every 5 minutes, practicing language like \u201cquarter past\u201d, \u201cquarter til\u201d, \u201chalf past,\u201d and thinking about cycles in the 24 hour day. This week, I joined as students were discussing the patterns of ones and tens of minutes that happen over the course of two hours in an afternoon. <\/p>\n\n\n\n
One student wrote out times on the board, as his classmates counted together, \u201c3:40, 3:45, 3:50\u2026\u201d They observed the numbers and discussed their noticings about how the hour numeral, the one-minute numeral, and the ten-minute numeral change through two hours.<\/p>\n\n\n\n
\u201cThe middle number actually also goes up by 1s,\u201d one student noticed. “It’s like a cycle; it goes up from 0, 1, 2, 3, 4, 5, but then it starts over.\u201d <\/p>\n\n\n\n
\nIt’s like a cycle; it goes up from 0, 1, 2, 3, 4, 5, but then it starts over.<\/p>\n<\/blockquote>\n\n\n\n
These Number Talks provide practice for analyzing how clocks count by ones and tens, but how they differ from other counting in that they reset every 60 minutes. Students also discussed norms and language about time, like the meaning of \u201cam\u201d and \u201cpm\u201d, and why we say \u201cquarter til\u201d– what\u2019s it a quarter of? Students connected the clock cycle to other cycles they know about, and made cultural connections to the way time is expressed in other countries and languages they know. They created individual timelines showing the hours of a full day\/night cycle, labeling times when they typically wake, sleep, and eat. Their teacher shared the origin\u201cam\u201d and \u201cpm\u201d (Latin for ante meridiem and post meridiem, or before \/ after midday). Students honed in on the silliness of saying \u201c12pm\u201d to refer to noon given the definition of pm<\/em>. <\/p>\n\n\n\n
One child said, \u201cbut when it’s exactly<\/em> midday, then it doesn’t make sense actually to say it’s \u2018pm\u2019 because it’s not pm until 1 second after 12:00. It\u2019s not \u2018after\u2019 until after\u2026 So really that’s just \u201812M.\u2019\u201d Precisely!<\/p>\n","protected":false},"excerpt":{"rendered":"
\u201cI think I know what \u2018PM\u2019 means, it maybe means \u2018prepare for midnight!\u2019\u201d 2nd Grade Mathematicians are learning all about time. Reading an analog clock …<\/p>\n","protected":false},"author":6,"featured_media":2326,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","content-type":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[242,20,205],"tags":[],"class_list":["post-2238","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-curriculum-connections","category-lower-school","category-mathematics"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.hillbrook.us\/voices\/wp-content\/uploads\/2023\/05\/clock-talks-2nd-grade.png?fit=886%2C666","_links":{"self":[{"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/posts\/2238","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/comments?post=2238"}],"version-history":[{"count":2,"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/posts\/2238\/revisions"}],"predecessor-version":[{"id":2324,"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/posts\/2238\/revisions\/2324"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/media\/2326"}],"wp:attachment":[{"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/media?parent=2238"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/categories?post=2238"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.hillbrook.us\/voices\/wp-json\/wp\/v2\/tags?post=2238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}