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I always used to start my lesson on squaring binomials with this but extended it to the form (n + a)2 = n2 + 2na + a2 and would start by asking kids for whole numbers close to 50 and I would square them in my head before looking at the algebra that showed why it worked.
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://x.com/howie_hua/status/1845116066386804979
If you know one perfect square, here's how you can mentally calculate the next perfect square: pic.twitter.com/ugD9qCOfb2
— Howie Hua (@howie_hua) October 12, 2024
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I appreciate that @JennaLaib continues to add to her collection of slow reveal graphs and I also like the reminder that we shouldn't steer away from controversial topics. Check out some of the new graphs including the one on the correlation between gun deaths and gun laws.
Curriculum Tags: MDM4U, MAP4C
https://slowrevealgraphs.com/
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I'm a big fan of quick dynamic student explorations, especially in geometry
Curriculum Tags: Gr7, Gr8, MTH1W
https://x.com/TimBrzezinski/status/1846846388207865990
Transversal cuts parallel lines — Quick student exploration: https://t.co/nPtWIxvdY6 @geogebra #MTBoS #ITeachMath pic.twitter.com/G5zBXcnY0I
— Tim Brzezinski (@TimBrzezinski) October 17, 2024
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If you are playing with prime numbers then this is neat. 561 is a not a prime number but by over 100 different prime tests it comes up as prime.
Curriculum Tags: MTH1W
https://findthefactors.com/2015/07/23/561-quick-prime-number-tests/
Mathematics.
— Cliff Pickover (@pickover) October 17, 2024
"561" is an interesting number. It gives a "false positive" to these 102 prime-number tests: https://t.co/35N3bE1DSL pic.twitter.com/FMet8xJYT6
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