David Petro

@davidpetro314

I am tribal. Math is one of my tribes & so is Ironman Triathlon. Though here I only tweet about Math & Science. PastPresident Fellow

Harrow, Ontario, Canada
Vrijeme pridruživanja: listopad 2009.

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  1. Prikvačeni tweet
    20. svi 2019.

    I just presented a session at on using Twitter as a PLN. Here are some tips to move beyond just "Lurking" and to increase the presence of your Tweets. Feel free to share more ideas in the comments

    , , i još njih 4
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  2. proslijedio/la je Tweet
    prije 14 sati

    Which of these bushfire relief donors was the most generous? What's your ranking? What information matters here? What would your students say?

    Chris Hemsworth – $1,000,000. BP $700,000, Jeff Bezos $700,000, Mariam, a high school student, $75.
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  3. proslijedio/la je Tweet
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  4. proslijedio/la je Tweet
    5. velj

    A huge thank you to for sharing the activities for modeling 2-digit multiplication and decimal multiplication. Students in 's 5th grade class are already giving them a try.

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  5. proslijedio/la je Tweet
    4. velj

    Applications Are Open for Cohort 5 of the Desmos Fellowship!

    Picture of last year's cohort.
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  6. 2. velj

    [New Activity] Using area to model decimal multiplication (with Challenge Creator)

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  7. 2. velj

    [New Activity] Practice multiplying two 2 digit numbers using an area model (with randomly generated problems).

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  8. 2. velj
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  9. proslijedio/la je Tweet
    1. velj

    A new podcast is out. Ep5 of S2 is out now featuring & talking about their upcoming webinar (Feb12): Manage Flow and Let Go! More info: Register:

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  10. proslijedio/la je Tweet
    2. velj

    A lot of tweets about miss that 02 February 2020 is a palindrome in USA, UK and ISO formats; it is a palindrome day of the year (33) and there are a palindrome of days left in the year (333). This will never happen again. More details here:

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  11. proslijedio/la je Tweet
    30. sij

    02/02/2020 is the only date in our lifetimes — and the 1st since 11/11/1111 — to be palindromic across the World, in whatever date format you choose.

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  12. proslijedio/la je Tweet
    30. sij

    Sketching Angles in Standard Position (positive & negative): More quick formative assessment with basic feedback: .

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  13. 26. sij
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  14. proslijedio/la je Tweet
    26. sij
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  15. proslijedio/la je Tweet
    23. sij

    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. h/t

    pre 2010, pretty reasonable power law graph
    post 2010, pretty reasonable power law graph, except for a huge spike right at the 280g threshold
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  16. 19. sij
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  17. proslijedio/la je Tweet
    18. sij

    Select three points randomly in a unit square. What is the area of the typical circle drawn through these three points? This was very much a surprise to me!

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  18. proslijedio/la je Tweet
    17. sij
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  19. proslijedio/la je Tweet
    17. sij

    This modified activity (thanks to Josh Giesbrecht) was a FANTASTIC introduction to rational exponents for my Algebra 1 crew yesterday! Go get it! ---> Check out this activity: Fractional Exponents !

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  20. proslijedio/la je Tweet
    15. sij

    We're looking for skilled presenters to help us spread the good word about technology, math, and learning through professional development events. Applications now open! Spread the word, y’all.

    image of workshop
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  21. proslijedio/la je Tweet
    14. sij

    Finally getting caught up on 's blog. If you haven't seen it lately, definitely check it out - there are LOTS of great resources there!

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