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Tracy Craig

@astrolabecat.bsky.social

Mathematics lecturer at a technical university in the Netherlands. Researcher of Mathematics Education. Lover of books, cats, pottery, maths, astronomy. SCA medieval reenactor. πŸ‡³πŸ‡± πŸ‡¬πŸ‡§ πŸ‡ΏπŸ‡¦ Profile pic: my cat Willow, of blessed memory

126 Followers  |  456 Following  |  22 Posts  |  Joined: 13.11.2024
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Posts by Tracy Craig (@astrolabecat.bsky.social)

Roses are redde
Noble are the manatees
For a bettir future
Teach artes and humanityes

19.02.2026 01:39 β€” πŸ‘ 562    πŸ” 176    πŸ’¬ 4    πŸ“Œ 2
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Classroom Notes Published in International Journal of Mathematical Education in Science and Technology (Vol. 57, No. 1, 2026)

From our editor-in-chief: everything you ever wondered about Classroom Notes.

Full article: Classroom Notes www.tandfonline.com/doi/full/10....

19.01.2026 01:07 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

My first ever job was at a supermarket. I worked with an older gentlemen who must’ve been in his late 70s and while I can’t name the supermarket due to an ongoing legal dispute the guy must be dead by now so I’ll just use his real name: Barnaby.

22.12.2025 07:08 β€” πŸ‘ 24    πŸ” 11    πŸ’¬ 4    πŸ“Œ 9
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A book from the 19th century that depicts the Rhine Valley by creating an impression of three-dimensionality and spatial distance.
@MasayukiTsuda2 #globalmuseum #books #travel #19thcentury

02.12.2025 19:02 β€” πŸ‘ 3451    πŸ” 1277    πŸ’¬ 38    πŸ“Œ 122
Pillars of Creation but with googly eyes and printed on a 1000-piece puzzle. Don't ask.

Pillars of Creation but with googly eyes and printed on a 1000-piece puzzle. Don't ask.

Today is the last day to order my #puzzles, so I'm sharing this monstrocity again 🀣

Yip yipp yippp!

Pillars of Googly Eyes available as 1000-piece puzzle 🧩

πŸ”— sciencesocks.co/pages/puzzle...

πŸ”­πŸ‘πŸ§ͺ🎨 #ArtAdventCalendar

04.12.2025 00:33 β€” πŸ‘ 240    πŸ” 68    πŸ’¬ 6    πŸ“Œ 10
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Gracefully carving through the solar corona, a mini eruption of filament plasma erupted from the Sun earlier today! Beautiful.

04.12.2025 00:35 β€” πŸ‘ 199    πŸ” 66    πŸ’¬ 6    πŸ“Œ 8
Voyager 1 artist’s depiction.

Voyager 1 artist’s depiction.

in case you didn’t know, in a year voyager 1 will be 1 light-DAY away from earth.

it took almost 50 YEARS of travel time to reach that distance and will be the first human-made object to reach this distance.

28.11.2025 23:32 β€” πŸ‘ 183    πŸ” 39    πŸ’¬ 3    πŸ“Œ 2
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Fundraiser by Simphiwe Mfazwe | Help me through Year One of a Musical Theatre Masters in Cologne Simphiwe Mfazwe Needs Your Help | About this crowdfunder : My name is Simphiwe Mfazwe. I come from the Kimberley in the Northern Cape province in South Africa. I have been accepted for the Ma...

I have donated to this fundraiser to send a South African opera singer to Hochschule fΓΌr Musik und Tanz KΓΆln. He won a prestigious chance to attend, but cannot afford travel & accommodation. Please consider contributing.
whydonate.com/fundraising/...

#opera #southafrica #kimberley #cologne #music

14.10.2025 05:17 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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MARTHINUS VAN STADEN: The cancer killing SA universities Parasitic industries drain resources, but something far more sinister is at work on campuses

πŸ”’MARTHINUS VAN STADEN: The cancer killing SA universities. Parasitic industries drain resources, but something far more sinister is at work on campuses. www.businesslive.co.za/bd/opinion/2...

18.08.2025 04:41 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 2    πŸ“Œ 0
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Cape Town journalists march in solidarity with media workers killed in Gaza A march in Sea Point, Cape Town, on Sunday was the latest in a series of protests aimed at spotlighting the targeted killing of media workers in Gaza. Local journalists led the demonstration, expressi...

Capetonians march in solidarity with media workers targeted and killed in Gaza. β€œEvery colonial project survives on two weapons: physical extermination of the colonised people and control of the narrative. The power to erase, distort and rewrite reality.” www.dailymaverick.co.za/article/2025...

18.08.2025 04:55 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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The Dane saga of Breda: A Late Medieval Account of Viking Endeavour and Vernacular Devotion: The Medieval Low Countries: Vol 11 Found in the municipal archives of Breda (present-day North Brabant, Netherlands) is a conspicuous but ill-studied late fifteenth or early sixteenth-century codex, whose contents are deemed to have been composed within the late medieval town. Although characterised as a local cross legend, the Middle Dutch work is customarily referred to by its modern moniker of Denensage (i.e. Dane saga) due to the presence and pursuits of β€˜viking’ mariners over the course of its verse narrative. By imparting how a group of Danes found their way to Breda and established a stronghold there – refashioning a prominent local tree into a cross in the process – the work occupies a distinct confluence of historiographical, devotional, and literary authorship. Situating the Dane saga in its sociocultural context, this article explores the wide-ranging narrative influences underpinning it, whilst determining its potential authorship and intended audience(s). Lastly, as well as furnishing a new edition of the manuscript, it offers the first English translation of this important, idiosyncratic text.

Beyond excited that my study of the medieval 'Dane saga' of Breda is finally out (OA πŸ”“) alongside a first English translation! This anachronistic oddity of devotional/literary storytelling posits how a group of 'vikings' arrived and troubled the city for years.

www.brepolsonline.net/doi/epdf/10....

07.08.2025 13:56 β€” πŸ‘ 60    πŸ” 18    πŸ’¬ 4    πŸ“Œ 4

With Tom Lehrer's passing, I suppose this is a moment to share the story of the prank he played on the National Security Agency, and how it went undiscovered for nearly 60 years.

27.07.2025 21:01 β€” πŸ‘ 8662    πŸ” 3616    πŸ’¬ 143    πŸ“Œ 717
A man wrapped up against the cold, surveys a frozen plain

A man wrapped up against the cold, surveys a frozen plain

The secret German weather station on the Arctic island of Svalbard. Part of the 'Weather War'.

The team, led by Lieutenant Wilhelm Dege, were the last German troops to surrender in WW2, finally doing so FOUR MONTHS after Germany had officially surrendered.

It was not for want of trying. /1

28.06.2025 06:51 β€” πŸ‘ 718    πŸ” 283    πŸ’¬ 16    πŸ“Œ 60
A square arrangement of 9 individual biscuit tiles painted in rich shades of blue and made to look old, chipped, and cracked. On the top row, there is: a ship with billowing sails approaching a dock with two stylized ducks or geese in the foreground; a delicate flower motif in the centre of a bright white tile with deep blue detail at each corner; a cracked tile depicting two figures in rustic historical dress looking out to sea, accompanied by a small dog. The middle row features: a roughly painted castle surrounded by an octagonal frame; an intricate floral arrangement with an angel at each of the tile’s four corners; a cluster of rustic buildings with boat sails and a flock of birds in the distance. Finally, the bottom row of biscuits includes: a figure fishing in the foreground of a multi-storey round tower; a woman wearing a flowing eighteenth-century gown, encircled by a deep blue floral pattern; a small vase of flowers in the centre of an aged white biscuit.

A square arrangement of 9 individual biscuit tiles painted in rich shades of blue and made to look old, chipped, and cracked. On the top row, there is: a ship with billowing sails approaching a dock with two stylized ducks or geese in the foreground; a delicate flower motif in the centre of a bright white tile with deep blue detail at each corner; a cracked tile depicting two figures in rustic historical dress looking out to sea, accompanied by a small dog. The middle row features: a roughly painted castle surrounded by an octagonal frame; an intricate floral arrangement with an angel at each of the tile’s four corners; a cluster of rustic buildings with boat sails and a flock of birds in the distance. Finally, the bottom row of biscuits includes: a figure fishing in the foreground of a multi-storey round tower; a woman wearing a flowing eighteenth-century gown, encircled by a deep blue floral pattern; a small vase of flowers in the centre of an aged white biscuit.

Delftware tiles!

There were hundreds of fabulous examples to choose from in the Victoria & Albert Museum’s online catalogue, but I eventually settled on nine.

These 18th-century ships, shepherds, castles, figures, and flowers brought me joy. I hope they’ll do the same for you, too.

29.05.2025 07:11 β€” πŸ‘ 1668    πŸ” 189    πŸ’¬ 16    πŸ“Œ 14
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#TudorTuesday
Man’s Cloak
1580-1590
Spain
Italian velvet

Silk velvet with applied border of silk satin, couched with silk cord

www.instagram.com/p/DKI9M7pNpn...

#Cloak #MansCloak #GentlemansCloak #SilkVelvet #Velvet #Clothing #ItalianVelvet #Spain #History

27.05.2025 04:17 β€” πŸ‘ 11    πŸ” 6    πŸ’¬ 0    πŸ“Œ 0
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Trump Makes False Genocide Claims. South Africans Respond With Humor.

Trump Makes False Genocide Claims. South Africans Respond With Humor. www.nytimes.com/2025/05/22/w...

23.05.2025 05:27 β€” πŸ‘ 3    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
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55 Unhinged Baby Names Parents Actually Picked "Twins in the NICU, one boy, one girl named Brock Lee and Callie Flower."

Life sucks. Laugh at these baby names instead
www.buzzfeed.com/kristatorres...

22.05.2025 02:31 β€” πŸ‘ 2    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

But are these various educational interventions worth burning the planet so that tech CEOs can get more wealthy?

That being said, I still feel pressured to use these tools somehow. People won't stop yelling at me (however metaphorically) until I do so. And that makes me unhappy.
(8/8)

21.05.2025 14:44 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I know the team and have huge respect for them. www.utwente.nl/nl/tnw/nieuw...
(7/8)

21.05.2025 14:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

3) educational. Yes, this is only point 3. I have seen very few examples of using "AI" in a way that helps students learn in ways that are not already achievable by other means. The one that recently won the Brinksma Innovation Grant at my University of Twente is an exception.
(6/8)

21.05.2025 14:44 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

2) sociopolitical. I loathe the idea of putting more money in billionaires' pockets. If these LLM companies were mom and pop businesses or young entrepreneur start ups, then that would be one thing, but they're not. www.forbes.com/sites/phoebe... #billionairesshouldnotexist
(5/8)

21.05.2025 14:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

... uses 5-10 times as much energy and water resources as a browser search. www.unep.org/news-and-sto..., news.mit.edu/2025/explain...
(4/8)

21.05.2025 14:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

1) environmental. Casual use of LLMs (because, let's be clear, my colleagues using AI in medical imaging and the like are using serious AI, not chatGPT) is really, really bad for the environment. For example, two reports here say that using chatGPT for what amounts to an online search ...
(3/8)

21.05.2025 14:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

As time goes on and I become more familiar with the options and possibilities, I become increasingly reluctant to follow this advice.

My reasons for not wanting to use AI in my teaching or in my education research are:
(2/8)

21.05.2025 14:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I feel crowded by people and communities insisting, with varying levels of urgency, that I employ "AI for education" in my classrooms and that I use it as a context for my maths education research. It is presented as an opportunity, a valuable tool, an unproblematic Good.
(1/8)

21.05.2025 14:44 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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It’s Mary Anning’s birthday, so time to share @katebeaton.bsky.social’s brilliant cartoon again.

21.05.2025 11:31 β€” πŸ‘ 18607    πŸ” 4531    πŸ’¬ 73    πŸ“Œ 91
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Open this photo up and look for the small, white dot just left of centre.

It looks like Venus, shining brightly in the twilight sky.

But it's us.

It's Earth.

From Mars.

24.11.2024 03:19 β€” πŸ‘ 2292    πŸ” 545    πŸ’¬ 59    πŸ“Œ 49

Gorgeous!

10.05.2025 05:30 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
Annie Jump Cannon sat at a desk. She is clearly not a fan of a clear desk policy as it's messy with papers and open drawers. She is a white woman with pale hair.

Annie Jump Cannon sat at a desk. She is clearly not a fan of a clear desk policy as it's messy with papers and open drawers. She is a white woman with pale hair.

#OnThisDay, 9 May 1922, the International Astronomical Union formally adopts Annie Jump Cannon's stellar classification system. The principles in it still underpin modern classification.

#WomenInHistory #OTD #History #WomensHistory #Astronomy #WomenInSTEM #AmericanHistory πŸ—ƒοΈ

09.05.2025 08:30 β€” πŸ‘ 50    πŸ” 9    πŸ’¬ 0    πŸ“Œ 1
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Oh, this?

Just sunlight reflecting off a lake.

A lake of liquid methane.

On an icy world 1.4 billion kilometres away.

24.11.2024 23:08 β€” πŸ‘ 445    πŸ” 62    πŸ’¬ 9    πŸ“Œ 4