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Dan Meyer
32.8K posts
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Dan Meyer
@ddmeyer
Currently: @DesmosClassroom @Amplify. Previously: high school math teacher. Always: recreational math user.
Oakland, CA
danmeyer.substack.com
Joined July 2007
406
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  • Pinned
    user avatar
    Dan Meyer
    @ddmeyer
    Aug 28, 2024
    This is the best thing I've ever had a hand in making. Click in and check it out. 👇
    user avatar
    Amplify
    @Amplify
    Aug 21, 2024
    🚀 Amplify Desmos Math is LIVE! 🧡 This groundbreaking K–12 math curriculum sparks curiosity, boosts engagement, and builds lifelong proficiency in math. 🔎 Discover more: amplify.com/adm #MTBoS #ITeachMath
    Graphic for new K–12 Math Curriculum featuring three students engaging in math activities inside a classroom displayed as a cross-section of a house. Books and mathematical symbols are also shown.
    19K
  • user avatar
    Dan Meyer
    @ddmeyer
    Jan 23, 2020
    Pre-2010, 50g of crack-cocaine got you a mandatory minimum 10 years in prison. Post-2010, that threshold was raised to 280g, which resulted in this .... uhhh suspicious drug seizure graph. #OMGraph #iteachmath h/t @JohnHolbein1 econweb.umd.edu/~tuttle/files/…
    pre 2010, pretty reasonable power law graph
    post 2010, pretty reasonable power law graph, except for a huge spike right at the 280g threshold
  • user avatar
    Dan Meyer
    @ddmeyer
    Dec 30, 2014
    So glad the @nytimes found an answer to their question from 2012, "Is Algebra Necessary?" [h/t a commenter]
  • user avatar
    Dan Meyer
    @ddmeyer
    Mar 30, 2023
    Watch a teacher make roughly ~1,000 instructional decisions in about 45 seconds. Only a few of them are about the lesson but the lesson depends on ALL of them. This is one of the hardest things to explain about teaching to people who have never taught.
    00:00
    275K
  • user avatar
    Dan Meyer
    @ddmeyer
    Nov 19, 2020
    My toddler’s walking around calling this his iPad and please no one mess this up for me. 🙏
    An etch a sketch.
  • user avatar
    Dan Meyer
    @ddmeyer
    Jan 23, 2020
    Replying to @ddmeyer and @JohnHolbein1
    That utterly implausible spike in 280g seizures, each one triggering a 10-year prison sentence? Would it surprise you to find out it disproportionately comprised Black & Hispanic people? #OMGraph #iteachmath
    the graph
  • user avatar
    Dan Meyer
    @ddmeyer
    Apr 24, 2020
    Bravest act by a comedian in any of our lifetimes: pinning the punchline of a joke to an adult crowd's recollection of FOIL.
    user avatar
    Tom Brennan
    @Brennanator
    Apr 24, 2020
    Pissed off by Trump’s Lysol “jokes”? That’s not just emotion, it’s mathematic equation at work. @darryldarryl_ explains: x.com/darryldarryl_/…
  • user avatar
    Dan Meyer
    @ddmeyer
    Feb 25, 2020
    Help me understand this ONE Venn diagram in my first year teaching and I would have been 10x more effective. This one right here.
    "Answers that are correct" v "Answers that are useful for learning."
  • user avatar
    Dan Meyer
    @ddmeyer
    Sep 25, 2018
    (1) Teachers should prepare with purpose for their lessons. (2) Students should understand the purpose of their work by the end of class. Neither of those goals requires posted objectives at the start of class.
    user avatar
    Jess Tilli
    @JessicaTilli1
    Sep 25, 2018
    If math is supposed to be discovery-based, what do my fellow math minds think about posted objectives? Do they take away from the opportunity for students to figure things out? @ddmeyer @gfletchy @robertkaplinsky @joboaler #mathchat #math
  • user avatar
    Dan Meyer
    @ddmeyer
    May 3, 2019
    28,000 comments at my blog over 11 years. Today's comment from Karl might be my favorite. blog.mrmeyer.com/2019/it-isnt-e…
  • user avatar
    Dan Meyer
    @ddmeyer
    Dec 18, 2022
    When salary isn’t keeping up with inflation but there’s hot chocolate in the teacher lounge.
    user avatar
    Secretary Miguel Cardona
    @SecCardona
    Dec 17, 2022
    Teaching isn’t a job you hold. It’s an extension of your life’s purpose.
    Secretary Cardona speaks with students as they sit around him in a classroom raising their hands
    78K
  • user avatar
    Dan Meyer
    @ddmeyer
    Sep 19, 2019
    level of worry █    █  █  █  _ inhabitability of losing our planet users
    user avatar
    Vince Ulam
    @VinceUlam
    Sep 19, 2019
    @Desmos Please do not push activism at your users or you might lose them:
  • user avatar
    Dan Meyer
    @ddmeyer
    Mar 9, 2020
    EVERY DAY EXCEPT MARCH 14: "Math isn't about memorizing random bits of information." MARCH 14: "PRIZES FOR ANYONE WHO MEMORIZES 500 DIGITS OF PI"
  • user avatar
    Dan Meyer
    @ddmeyer
    Jul 18, 2019
    Never let your students forget that loads of math is just noticing stuff and making up names for it. #iteachmath
    user avatar
    Fermat's Library
    @fermatslibrary
    Jul 18, 2019
    A golygon is any polygon with all right angles whose sides are consecutive integer lengths.