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  • Jeff Harvey

    May 31, 2021 at 3:22 pm

    I used the “put your arms around it” task from Mindset Mathematics book in several Gr 2-4 Elementary Math classes. Students explore perimeter by going around the room with a string (students get all different sizes) and they have a chart – objects that are too small and objects that are too large and they write them down on their clipboard. They draw the object in the room that the string wraps around perfectly on the back of their page. What I am realizing about this task is that it works because there is alot of estimation going on as Ss try to predict which objects in the room it could fit around. There is not much information given to them and there is lots of noticing and wondering going on. They get to explore objects that are of interest to them. Will my string wrap around my waist? Around this globe? Around this recycle bin, water bottle… etc. It’s also a nice visual and physical model / manipulative to refer to later. How the teacher presents the students with their string and starts the questioning would be important to “withhold info, create anticipation, get noticing and wondering and then estimation…” Knowing what I know now, I think I’d do a better job with this lesson next time I try it.