Christopher Danielson

@triangleman.bsky.social

1622 Followers 344 Following

Kids, math, fruit, words talkingmathwithkids.com

Blue horizon with bright orange and mauve clouds above, through a very ordinary urban street scape
A big yellow flower with a little tiny pumpkin at its base
85 degrees and partly cloudy in Saint Paul MN
A postcard with an eagle and a banner that says 1947 and 2026 (this particular neighborhood event started in 1947, for context) reads: YOUR SUPPORT AND PARTICIPATION MATTERS THIS EVENT ONLY HAPPENS BECAUSE OF THE GENEROSITY OF OUR LOCAL NEIGHBORS & BUSINESSES CELEBRATE OUR NATION'S SESQUICENTENNIAL
A newspaper headline: “U ditches Leave a Future' tagline Slogan received confused response.” By ERIN ADLER The Minnesota Star Tribune The University of Minnesota is ditching its new "Leave a Future" tagline after U officials…
A yard-stick-like ruler lies on a wooden table with the unit “ducks” stated, and labeled marks at 1,2…up to 12. There are many small rubber ducks in the background
A purple painted puzzle piece that appears to be circular, but on close examination is a regular polygon with a large number of sides. In the background is a puzzle frame with the words “regular polygons “ and we can see a regular pentagon among others
Selfie of me with a large gray duck mascot. In the distant background is building with “grandstand” in large capital letters. The weather is gray and chilly, also breezy by the looks of my hair blowing around
Khan’s comments are an acknowledgement that AI has not quickly allowed for the creation of an effective super-tutor, as some initially hoped. It’s an early indication of the limits of AI to drive massive learning gains, long an unrealized goal of various technologies. While Khan remains optimistic about various uses of AI in education, he’s also come to see its limits.
Still, there were moments when the model forgot who it was, or hallucinated with so much swagger that it took several steps before anyone noticed. "The weird thing about the model is that you'll be disappointed for a long time until you're not," Ms. Shieh said. "I've seen that curve several times, and it's still surprising to me."
Dear CHRISTOPHER DANIELSON, Your claim in the Anthropic Copyright Settlement has been received. Your Claim Number is [redacted]. Please keep this number for your records. For more information about the Settlement, call toll-free 1-877-206-2314, visit www.AnthropicCopyrightSettlement.com, or respond to this email with any questions. Regards, Claims Administrator
Logo for Kerbys Koney Island with a chili dog and a red white and blue theme
Selfie with a goofy face and a wooden sign reading “keep change flip” in the visual style of “live laugh love “
A Venn diagram with disjoint and distant circles labeled “the math of life” and “the math of school”
A large window is filled with a colorful and highly symmetric Islamic geometry design with (roughly) 10-fold symmetry. The display is made from brown kraft paper and colorful copy paper. At the bottom of the image is this message: "based ona design from the Ulugh Beg Madrasa in Uzbekistan and adapted from Eric Broug's Islamic Design Workbook"
A red and a blue candy snake lie side by side in a wooden cutting board
13.2: Liters, Meters, and Hours There is a list of 12 questions such as "How much is 50% of 10 liters of milk?" and "How far is 10% of a 2000 kilometer trip?" There is a diagram at the right with three equal-sized rectangular bars; one of top of the other. The top two are labled "10" and "2,000", the bottom one is partitioned into two equal lengths. One of these is labeled with a question mark and spanned with the label "50%". There is a description above the questions and diagrams: "This is a 5-minute warm-up activity where students work in groups to identify the percentage of a diagram that's shaded, covering a single question. The activity builds on decimals understanding (4.NF.B) and leads towards mastering percentages (6.RP.A.3c), enhancing understanding of mathematical concepts." Notably, the diagrams contain no shading.
TOP STORY La Crosse runners celebrate St. Patrick's Day with 0.1K sprint/run Ace Elsen Mar 14, 2026 Updated 4 hrs ago
A map of potential snow accumulations from the Dakotas across Minnesota, Wisconsin, and the UP of Michigan. There are snow ranges that include "4 to 22 inches" for the Twin Cities and "9 to 28 inches" in Wausau, WI
screenshot of an icon: a white X inside a red outlined hexagon, all on a black background above the word "End"
IM® 6-8 Math v.360, an IM v.360 curriculum, is ©2024 by Illustrative Mathematics®, and licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). IM 6-8 Math v.360, an IM v.360 curriculum, is a derivative of IM 6-8 Math. IM 6–8 Math was originally developed by Open Up Resources and authored by Illustrative Mathematics®, and is ©2017-2019 by Open Up Resources. It is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0) . OUR's 6-8 Math Curriculum is available at https://openupresources.org/math-curriculum/ . Adaptations and updates to IM 6-8 Math v.360 are ©2024 by Illustrative Mathematics, and are licensed under the Creative Commons Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). Adaptations to add additional English language learner supports are ©2019 by Open Up Resources, and are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).
Roo with @cheesemonkeysf on agreen couch in a sunny room
A Pomeranian with a very short cut and a tennis ball head rides in a car on a sunny day
A Tony’s chocolate bar subdivided into smaller pieces of arbitrary size and shape, looking a bit like the skin of a giraffe or a dried cracked lakebed
A breakfast buffet with the usual selection of watermelon cantaloupe and honeydew
“Scrutiny builds over ilhan omars personal wealth”
A car turns right on red in front of two No Turn on Red signs
A brightly colored wooden puzzle labeled “Hexagons” with a variety of mostly irregular hexagons, some without mirror symmetry-notably including a blue one shaped like a Z or N in the lower left corner
Subscribe Jeff Day JANUARY 24, 2026 AT 10:31 AM Man shot by federal agents has died, police chief says The man shot by federal agents this morning has died, Minneapolis Police Chief Brian O' Hara told the Minnesota Star Tribune. Several witnesses have already been transported to the Whipple building. ICE attempted to order local police from the scene, but O'Hara refused, sources said. O'Hara instructed his officers to preserve the scene. The BCA was en route to the scene. All available MPD officers have been called into work, except dogwatch (overnight shift), and days off cancelled. Liz Sawyer contributed reporting:
An Instagram post about exploding trees. A tree is shown with the trunk opened up Into three pieces, bent wildly outwards from the center. It is winter and there is a good amount of snow in the forest
A yellow wool blanket sports a gray woven mend and lies at the foot of a ridiculous very old and short haired Pomeranian
A snowy street, a water tower, bare ruined trees where late the sweet birds sang, and a sky striped with orange clouds
Four paired images. Each pair consists of (1) a photograph of a pattern drawn in sand on a rotating disk, and (2) a graph showing a close approximation the sand pattern, rendered digitally on a grid of polar coordinates. From left to right, the patterns are (1) circle centered at the origin, (2) circle, off center from the origin, (3) linearly growing spiral, and (4) linearly growing spiral, but the path is more star-shaped and jaggedy than circular, and having seven "points" on the star.
A small, ridiculous Pomeranian with closely cut fur and a tennis ball head, stands on a gray couch
five shapes on a poster hanging from a hook. Two triangles at the top, three quadrilaterals beneath. Under each shape is a scribbly line imitating text. Each shape has an internal subdividing line, such as you might use to indicate the height of a shape that lacks right angles. Importantly, the ones in the triangles are not perpendicular to any of the sides (although one more egregiously so than the other), and one of the lines in a non-square rectangle is a diagonal. All of the shapes, notably, have horizontal bases.
A modal popped up in front of a cartoony window with a melancholy bunny. This bunny has maybe been crying, or is about to? Imagine like your childhood invisible friend bunny has come to life and is seeing you again for the first time since you cast him prior to your own adolescence. This bunny has known sadness, and is now filled with a tentative yet powerful hope. The modal reads "Start your tour by choosing a section! Show me how ALEKS Adventure" and then there are four options (1) Engages and motivates students (0/18), (2) Individualizes to Students' Needs (0/11), (3) Supports Independent Learning (0/15), (4) Builds Retention and Mastery (0/12)
Again there are tall and short markings—seven shorts between each tall. The first of these is at the far left of the ruler, perhaps denoting zero? And again the digits are centered between the tall markings.
A ruler measures a fish. The ruler has tall/long markings, with shorter ones in between. The numbers on the ruler are centered between the tall markings. There are seven shorter markings between each of the tall ones, and four markings between the left-most tall one and the end of the ruler. The fish is measured between the tall marking to the right of 3 and the one to the right of 6.
A 100 year old hand cranked cast iron food grinder is attached to a countertop
A happy older lady rides an adult Sized tricycle in a parking garage.
A city work vehicle is parked at a bus stop
A half gallon of cider from the Franklin cider mill (ingredients: fresh Michigan apples) rests on a wooden bench on front of a stream full of ducks
A display of Faygo glass bottle six-packs. Grape, Redpop, Orange, and Creme Soda are visible
A grey morning sky above a suburban concrete and asphalt landscape. There is a small leafless tree in the foreground
A screen announcing Sun Country Flight 1981 to Detroit, departing at 7:12 am
Slide with this headline: “Supplemental Secondary Math Spending Projected to Fall; Slight Decrease Foreseen in ELA” Survey Question: When it comes to the following types of middle and high school curricula, how do you anticipate your spending for NEXT YEAR'S budget (2026-27) will compare to the spending in the current (2025-26) budget? Graphs show that somewhat fewer respondents said they expect spending to increase (versus stay the same or decrease) compared to a year ago.
A paper sign hangs in a quirky coffee shop next to the menu. “ DRINK DU SPOOKY JOUR DIRT AND WORMS Dad tip of the day: for your next grown up potluck party, ignore the requests of the host to bring gross things like salad or whatever, and just bring a giant bowl of pudding, oreos, and gummy worms. 100% chance of success. Anyway this is that but a latte. House-made (duh) oreo milk and chocolate with gummy worm garnish. Boo!”
screenshot of an email subject line that reads in part "Your myCigna account"
Triangleman and four children all looking and pointing at the page of a picture book. One child slid out of her seat at the far end of the table and sprawled across it to get within reach of the book.
A toddler grins outside on a sunny day, wearing a long-sleeved black t-shirt with a variety of googly-eyed, mostly irregular hexagons and the word HEXAGONS at the top.
Email header screenshot. From Better Homes and Gardens. Subject line: The No. 1 Ingredient for the Best Apple Pie. Preview text says “It may be hiding in your fridge.”
A small aloe plant in a square brown plastic pot on a ceramic circular coaster rests on a table where it casts shadows in two directions. A brick wall is in the background.
Chapter 2: The Math of Which One Doesn’t Belong? INTRODUCTORY TEXT Sets In math, a “set” is a collection of things.
Chapter 1: What Counts as Counting? MAYBE A TMWYK EXAMPLE HERE Counting is how you know how many. OK. That’s not quite true. If you know at a glance how many dots...
A small melon sits next to a large apple on a wooden table top. They are just about the same size.
"If there are only two jobs total, you may check this box" This is just to right of a selectable radio button.
screenshot with a pencil and clipboard icon, and "Withholding Forms Wizard. Incomplete." In red type it reads, "-4 days overdue"
A wooden shapes puzzle labeled “PENTAGONS” which has, near its center, the shape as described
Selfie with my wife. She is wearing a black and white shirt covered in tiny equilateral triangles. A piece of hexagon art hangs in the background
A green obtuse isosceles triangle (in the style of a chunky toddler toy) rests atop a “Conic Sections” puzzle which has green painted spaces for hyperbola pieces. It looks as though the triangle could adjust about fit into the hyperbola hole.