I learn; I help others learn Mathematics Educator/Microsoft Education Fellow/PCMI - Institute for Advanced Study/Aux Constable @cal_armstrong@mathstodon.xyz
Canada
Joined January 2008
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- Following4K
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Cal Armstrong retweeted
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/202…
Links and help from @MaryBourassa @Ayliean @Math_files @howie_hua @fermatslibrary and more #MathChat #MTBoS #iTeachMath
"When we're teaching mathematics, we're always making choices about accuracy"
Shelley Yearley at TEAMS @OAMECOUNTS conference this morning
#onted #mtbos
Cal Armstrong retweeted
If you want to get better at math, then you have to solve a shit-ton of math problems that are continually calibrated to your level of ability.
There's no way around it.
Even if you watch videos, read textbooks, learn about the lives of famous mathematicians...
If you can't bring yourself to suck it up and solve the problems, then you're not actually going to get better at math.
Cal Armstrong retweeted
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/202…
Links and help from @KarenCampe @Desmos @howie_hua and more #MathChat #MTBoS #iTeachMath
Cal Armstrong retweeted
Your team is ready to tackle the problem. But is everyone ready to work together?
Save this checklist, and send it to your teammates.
Explore COMAP contests at comap.org/contests
#MathModeling #HiMCM #MidMCM #MCM #ICM
Cal Armstrong retweeted
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/202…
Links and help from @TheErickLee @howie_hua @jamestanton and more #MathChat #MTBoS #iTeachMath
Cal Armstrong retweeted
People will happily commit their children to professional sports and coaches who require hours of repeated drills and practice.
But when it comes to math, suddenly we hear that “too much practice” is a bad thing.
If athletes want to develop automaticity, they practice the skill repeatedly.
If we want a student to develop automaticity in math, we ALSO need them to practice the skill repeatedly.
Practice isn’t the enemy to be avoided. Practice is how skills become automatic.
Cal Armstrong retweeted
"Where there's a pattern, there's a reason." - Douglas R. Hofstadter
Want more math quotes? Click here: comap.com/blog/item/math-quo…
#Quotes #MathQuotes #MathTeacher #MathStudent #Math
Cal Armstrong retweeted
The joy of math is similar to the joy of exercise. You gotta earn it. Exercise gets way more fun once you notice a body transformation getting underway. It's the same way with math.
But nobody feels the transformation on day one. Or day two, or even day three. You gotta stick with it for months before you really notice a difference.
#onted elementary educators.
The #otf Subject Associations are returning for another free virtual session to answer your questions, provide resources and support.
Wednesday October 7th at 7pm.
bit.ly/lifelineoctober to register and submit any questions in advance
Cal Armstrong retweeted
‘Canada is facing an ongoing cyber talent-shortage’: Ontario student teams heading to Waterloo for CyberTitan competition waterloochronicle.ca/news/ca… via @wlchronicle
Cal Armstrong retweeted
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/202…
links and help from @greatlakescent @pickover and more #MathChat #MTBoS #iTeachMath
Cal Armstrong retweeted
It’s Suicide Prevention Day.
Start the conversation.
No judgment. No cost.
Just someone who gets it.
1-833-677-2668
We're here to listen.
#BootsOnTheGround #SuicidePreventionDay #StartTheConversation #FirstResponders
Cal Armstrong retweeted
Building a strong modeling team starts before the contest does.
HiMCM/MidMCM registration opens soon. Start thinking about the teammates who bring different strengths, communicate well, and work through challenges together.
himcmcontest.org/
#HiMCM #MidMCM #MathModeling
Cal Armstrong retweeted
It's often said that stories are psychologically privileged, but I have always thought that this would be easier to do in science than in mathematics. Here's a study that confirms my prejudice: bit.ly/4gSEdqi
Cal Armstrong retweeted
I've always attributed "Intelligence is knowing what to do when you don't know what to do" to Piaget, but that is apparently a paraphrase. In my search I found this on page 165 of the 1964 edition of John Holt's "How children fail".
Cal Armstrong retweeted
[New Post] Ontario Math Links - My favourite #math related links from this week:
ontariomath.blogspot.com/202…
Links and help from @OAMEtalks @KarenCampe @AWMmath @howie_hua @MrCorleyMath and More
#MathChat #MTBoS #iTeachMath
Cal Armstrong retweeted
As we get ready for the 2026 HiMCM and MidMCM contests, take a look at how students and advisors can prepare before the contest begins.
Read more: comap.org/blog/item/how-to-p…
Registration for the 2026 HiMCM and MidMCM contests will be opening soon!
#HiMCM #MidMCM #MathModeling
Cal Armstrong retweeted
Season 9 of @OAMEcounts OAMEtalks is live at talks.oame.on.ca This season has speakers from #OAME2026 talks.oame.on.ca/season-9 featuring
@TheErickLee K. Kozlowski, A. Painter, S. Tyrrel, M. Goveia, M. Munk, @KirstDy @webbkyle
#MathChat #MTBoS #iTeachMath
Cal Armstrong retweeted
[New Podcast] This episode features @TheErickLee previewing their Sept 9th @OAMEcounts FREE webinar "Bigger on the Inside: The Surprising Power of Short Math Routines". More info:
talks.oame.on.ca/season-9
#MathChat #MTBoS #iTeachMath
