Author | Lightnews

Reposted by Jason To | 杜澤信

Codruta Colceriu @codruc.bsky.social · 4d

How can we count efficiently? Counting Collections to start the Number Sense unit that will focus on representing, composing and decomposing numbers. Grade 3s @tdsb.on.ca Gracedale PS came up with amazing observations! @mrjasonto.com @tdsbmath.bsky.social

2 2

Reposted by Jason To | 杜澤信

Tiffany @tleeteach.bsky.social · 3d

Day 2 of Leadership in Destreamed Mathematics PD and leaders got to play with algebra tiles to explore how they could use them to collect like terms, add/subtract polynomials, multiply and expand, factor and complete the square. So much fun! @mrjasonto.com @tdsbmath.bsky.social

3 4

Reposted by Jason To | 杜澤信

Tiffany @tleeteach.bsky.social · 7d

Day 1 of facilitating with @codruc.bsky.social on Shaping Algebraic Reasoning with grade 7-10 teachers. Such a great PD on patterning and linear relations. Great activities to bring back to the class and do with students. @mrjasonto.com @tdsbmath.bsky.social

4 5

Reposted by Jason To | 杜澤信

Tiffany @tleeteach.bsky.social · 7d

Exploring unit fractions with grade 9s at Emery CI. Lots of math conversations happening! @mrjasonto.com @tdsbmath.bsky.social

2 2

Reposted by Jason To | 杜澤信

Tiffany @tleeteach.bsky.social · 7d

Day 1 of Unlocking Fractions with grades 2-5 math teachers was great! Dived into equal sharing, estimating proportions and unit fractions! @tdsbmath.bsky.social @mrjasonto.com

2 2

Reposted by Jason To | 杜澤信

Tiffany @tleeteach.bsky.social · 7d

Using mini whiteboards as a tool for a whole class formative assessment is so quick and easy to do. Great strategy! @mrjasonto.com @tdsbmath.bsky.social

2 2

Jason To | 杜澤信 @mrjasonto.com · 28d

I got to meet folks from Tokona te Raki, an organization that is tackling academic streaming to promote educational equity for Māori children in New Zealand.

I shared some insights about destreaming in Ontario and they captured them in their annual report.

www.maorifutures.co.nz/research/kok...

1 2

Reposted by Jason To | 杜澤信

Tiffany @tleeteach.bsky.social · Sep 25

Day 1 of Leadership in Destreamed Mathematics🤩! Had VP/Ps,CL/ACLs & teachers analyze school data to help set goals.& Looked at formative assessments & talk about next steps through small group instruction. & Worked on linking factor trees to scientific notation! @mrjasonto.com @tdsbmath.bsky.social

2 3

Jason To | 杜澤信 @mrjasonto.com · Sep 21

When I’m not math-ing, I’m winning NHL94 world championships 🏆🏆🏆 @nhl94.bsky.social

1 9

Reposted by Jason To | 杜澤信

Jenna Laib @jennalaib.bsky.social · Sep 21

I wrote up an experience using a slow reveal graph with a fourth grade class for Edutopia. ✨

Edutopia @edutopia.org · Sep 21

By revealing graphs piece by piece, teachers can build student curiosity and guide them to more effectively make sense of data! 📊

#DataLiteracy #EduSky #MathSky

The Power of Slow Reveal Graphs

Teachers can leverage students’ curiosity to explore visual representations of data in an engaging way.

edut.to

4 14

Reposted by Jason To | 杜澤信

Athul K. Acharya @athul.acharya.cc · Sep 9

"Harvard can't use race as a factor in admissions, but ICE can use race as a factor in detentions" is a retrenchment essentially to a pre-Civil War understanding of the Constitution. It's vanishingly few steps removed from "Latinos have no rights which the white man is bound to respect."

220 5.2K 16K

Jason To | 杜澤信 @mrjasonto.com · Sep 1

Financial literacy education is most plagued by the relevancy issue. 13-year-olds just don’t see credit card debt as being relevant.

Also, Ontario students rank amongst the highest in the world in financial literacy. So what problem is this test trying to solve?

www.cbc.ca/news/canada/...

OECD chart showing students from Canadian provinces as ranking with Denmark as having the highest level of financial literacy in the world.

2

Jason To | 杜澤信 @mrjasonto.com · Aug 31

Well deserved - congratulations!

Reposted by Jason To | 杜澤信

Ilana Horn @ilanahorn.bsky.social · Aug 31

[GIFT ARTICLE] Mathematician Eugenia Chang explores the choices we make to determine if two things — numbers, shapes, words and even people — are equal. www.nytimes.com/2025/08/30/s... #iteachmath

You Don’t Need to Be Good at Math to Enjoy It

www.nytimes.com

12 30

Reposted by Jason To | 杜澤信

Ilana Horn @ilanahorn.bsky.social · Aug 22

🧵 New #openaccess pub just dropped:

"Teachers' subjectivities in responsive instruction:
When ambitious instruction encounters challenging teaching situations"

by me, Yeliz Günal Aggül, Shuqin Li, and Christine Hood

#AcademicSky #EduSky

link.springer.com/article/10.1...

Teachers’ subjectivities in responsive instruction: when ambitious practice encounters challenging teaching situations - Instructional Science

In the pursuit of inclusive classrooms, educators have identified the importance of teachers’ responsiveness to the particular students they teach. To date, research on responsive teaching has emphasi...

link.springer.com

1 5 10

Reposted by Jason To | 杜澤信

Alayne Armstrong @armstrg.bsky.social · Aug 23

The Racial Justice in Early Math project [Image of child's arm and some red and white counters on a desktop]

Racial bias affects early math education. Researchers are trying to stop that

Researchers say more resources, teacher awareness needed to combat racial bias in math lessons.

hechingerreport.org

4 3

Reposted by Jason To | 杜澤信

Rachel Lambert, prof at UCSB, teacher! @mathematize4all.bsky.social · Aug 24

Great thread about the role of motivation/connection/interest in cognitive load theory . . . #ITeachMath #MathEd

Nick Covington @covingtonedu.bsky.social · Aug 24

Re: transient information effect.

In my own experience, the stuff that seems to stick has less to do w/ knowledge & more to do w/ purpose, intention, & emotional connection. What I know going on matters less than what I'm going to do with it because I can always find/figure out what I don't know.

1 4

Jason To | 杜澤信 @mrjasonto.com · Aug 24

Solid math teaching really is a strategic blend of inquiry for sense-making & agency w/ explicit instruction for skill-building & fluency.

The key is knowing how concepts progress & how students in the class learn best.

Inclusion in math ed needs BOTH approaches.

www.edweek.org/teaching-lea...

How Should We Teach Math? General and Special Ed. Researchers Don't Agree

The divide makes it less likely that students who struggle will get access to proven strategies, researchers argue in a new study.

www.edweek.org

2 7

Jason To | 杜澤信 @mrjasonto.com · Aug 19

MAGAs from Oklahoma need to worry a little less about leftist boogeyman teachers and a crap ton more about actually teaching kids how to read and do math. This is just bizarre and embarrassing.

apnews.com/article/okla...

Screenshot of the linked article with the title: “Oklahoma ideology test for teachers from New York and California draws criticism.”

Screenshot of an article with the title “Results of the National Assessment of Educational Progress (NAEP) are in, and Oklahoma remains near the bottom nationally.”

1

Jason To | 杜澤信 @mrjasonto.com · Aug 12

People catch flack for changing their opinions when new facts become available.

As if changing one’s position is a sign of weakness.

But changing an opinion should be seen as a sign of growth and humility.

If you’re a leader who asks others to change their minds, be ready to model it yourself.

1 4

Jason To | 杜澤信 @mrjasonto.com · Aug 12

Students using AI to complete work is a direct reflection on the school system’s focus on products & end results.

If we want students to form opinions, analyze information, and really think, then THAT needs to be what we look for. The PROCESS needs to take centre stage

www.cbc.ca/news/canada/...

AI and social media are everywhere in teens' lives. Can they impact cognitive skills? | CBC News

Technology is an integral part of schooling today, but when students use ChatGPT to complete assignments or scroll TikTok to research topics, what's happening to their cognitive skills? Concern that d...

www.cbc.ca

1 1 5

Reposted by Jason To | 杜澤信

The New Yorker @newyorker.com · Aug 10

Mark Peterson’s black-and-white images of ICE agents evoke film noir and the urban-crime photography of the 1930s and ’40s. “If someone is doing everything right, and then they still get detained, it’s a crime scene,” he said.

ICE’s Spectacle of Intimidation

Immigrants showing up for court dates in Manhattan must now navigate past rows of masked federal agents.

www.newyorker.com

250 3K 8.5K

Jason To | 杜澤信 @mrjasonto.com · Aug 10

Every American who’s been unlawfully detained under this immigration dragnet should organize a class-action lawsuit. Police have to pay for this catch-and-release racial profiling.

My heart goes out to communities that must be living in a constant state of fear.

www.miamiherald.com/news/local/i...

Tasers and neck restraints: A U.S. citizen recorded his arrest by state, federal agents

“They’re not going after criminals, they’re going after landscapers and roofers,” he told the Miami Herald

www.miamiherald.com

1 2

Jason To | 杜澤信 @mrjasonto.com · Aug 10

Congratulations to my TDSB math teaching colleague and friend, Sam Garrison, on swimming across the freakin’ English Channel!!!

Sam trained for years and raised funds for the Daily Bread Food Bank. Read/listen to his story:

vancouver.citynews.ca/2025/08/08/t...

Keep calm and swim on: how a Canadian man conquered the English Channel

In July, Toronto high school teacher Sam Garrison defeated the odds and made a solo swim across the English Channel.

vancouver.citynews.ca

3

Reposted by Jason To | 杜澤信

Brian Bilston @brianbilston.bsky.social · Aug 4

The mathematician John Venn was born on this day in 1834. To commemorate the occasion, here’s a poem in the form of a Venn diagram.

Poem title: At the Intersection

The poem is divided into two overlapping circles.

The left-hand circle is titled ‘me’ and the text reads:
the day we
went out to have
an ice-cream, we said nothing
just let our silence melt in
the air as we walked across the common
our love never tiring at all

The right-hand circle is titled ‘you’ and the text reads:
we should
have talked it over but
nothing ever seems to get
in your fat head. You are so
common that I wish we’d never met
at all and I’d married Tim instead

In the intersection of the poem (where the two circles overlap), the text reads:
we
have
nothing
in
common
at all

26 220 620