Daniel Scher
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danielscher.bsky.social
Daniel Scher
@danielscher.bsky.social
100 followers 110 following 35 posts
Math educator who enjoys mathematical puzzles, origami, and Scottish dancing. Website: sineofthetimes.org
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danielscher.bsky.social
Daniel Scher @danielscher.bsky.social · Jan 16
Some Web Sketchpad news: You can now build customizable activities, choosing from over 60 geometry and algebra tools, and then collect students' work to review all on one webpage. Get started here: geometricfunctions.org/fc/tools/. Feedback welcome!
Reposted by Daniel Scher
catrionaagg.bsky.social
Taught my first #MathsToday lessons of the year! I forgot how much fun this topic is with Year 7. Today we played “guess the method from the calculation”.
The instruction “Count the dots in two different ways” and three copies of the same pattern of dots. Next to each one a calculation has been written - these were answers from different students. The patterns have then been annotated to show other students’ guesses as to how they arrived at these calculations.
September 4, 2025 at 5:00 PM
Reposted by Daniel Scher
divbyzero.bsky.social
Next week, I'm giving a talk at the @momath.bsky.social MOVES conference on the purely probabilistic dice game Left Center Right. Rather than creating slides to explain the rules, I decided to try "vibe coding" to see what I could create using AI. Here it is divisbyzero.github.io/Left-Center-...
August 5, 2025 at 2:07 PM
Reposted by Daniel Scher
catrionaagg.bsky.social
The three rectangles are congruent. What fraction of the design is shaded?

#geometrypuzzle
Three partially shaded congruent rectangles, with unshaded triangles connecting some of the corners.
July 5, 2025 at 11:03 AM
danielscher.bsky.social
Some fun with number bases (2 through 10) in my latest Sine of the Times blog post: www.sineofthetimes.org/more-fun-wit...
July 1, 2025 at 12:29 AM
Reposted by Daniel Scher
priy45hah.bsky.social
Lots of…
Ooo,
But,
No
Wait
as we explored the statement, ‘Any quadrilateral can be made from two triangles’ in #MathsToday
June 30, 2025 at 4:15 PM
Reposted by Daniel Scher
catrionaagg.bsky.social
These triangles are congruent and isosceles. What’s the area of the semicircle?

#geometrypuzzle
A blue triangle on top of a purple one, inside a semicircle. The side length of the purple triangle is 4.
June 21, 2025 at 10:05 AM
Reposted by Daniel Scher
catrionaagg.bsky.social
Four squares. What’s the angle?

#geometrypuzzle
A big green square and three little white ones. A pink line joins the corner of one the white squares to a corner of the green one.
June 7, 2025 at 8:23 AM
Reposted by Daniel Scher
fawnnguyen.substack.com
NEW post: Cracking the Strategy, when a 4th grader explains her thinking
fawnnguyen.substack.com/p/cracking-t...
Cracking the Strategy
A fourth-grade window seat to line plots and dot paper fractions
fawnnguyen.substack.com
June 3, 2025 at 2:10 AM
Reposted by Daniel Scher
catrionaagg.bsky.social
What fraction of the triangle is shaded?
#geometrypuzzle
Part of this triangle has been shaded orange.
May 29, 2025 at 1:20 PM
Reposted by Daniel Scher
catrionaagg.bsky.social
Four quarter circles. What fraction is shaded?
#geometrypuzzle
A design made of four quarter circles, which is partially coloured pink.
May 30, 2025 at 9:39 AM
Reposted by Daniel Scher
fawnnguyen.substack.com
One of those heart-FULL teaching days:

New post: open.substack.com/pub/fawnnguy...
Dot Paper Task
A low-tech task with high-level thinking
open.substack.com
May 23, 2025 at 3:02 AM
Reposted by Daniel Scher
johngolden.bsky.social
New blogpost on a #mathart lesson we did with preservice teachers and 1st and 2nd graders with some string art type patterns. mathhombre.blogspot.com/2025/05/star... #teachered
Star Patterns - a Mathart Lesson
One of my favorite courses to teach is our embedded elementary whole number and operation teacher prep course. Typically they teach every co...
mathhombre.blogspot.com
May 26, 2025 at 2:54 AM
danielscher.bsky.social
This was a no-brainer for me when it came to funding this project on Kickstarter. www.kickstarter.com/projects/bra...
Elipso - Ellipse Drawing Tool
Inspired by the Archimedes Trammel, we present to you Elipso. A solid brass, scalable ellipse drawing tool.
www.kickstarter.com
May 4, 2025 at 1:38 AM
Reposted by Daniel Scher
profsmudge.bsky.social
A 'flip' but probably easier than a 45˚ reflection
April 15, 2025 at 4:05 PM
Reposted by Daniel Scher
ntraft.bsky.social
Kudos to @nytimes.com for covering ARC-AGI in such an exquisite example of interactive data journalism. Amazing spot for @fchollet.bsky.social as well.
www.nytimes.com/interactive/...
Are You Smarter Than A.I.?
Some experts predict that A.I. will surpass human intelligence within the next few years. Play this puzzle to see how far the machines have to go.
www.nytimes.com
April 1, 2025 at 12:41 AM
Reposted by Daniel Scher
ilanahorn.bsky.social
for a student who used AI to write a paper #poem
A photo of a poem titled, "To a student who used AI to write a paper." Now I let it fall back in the grasses. I hear you. I know this life is hard now. I know your days are precious on this earth. But what are you trying to be free of? The living? The miraculous task of it? Love is for the ones who love the work.
March 25, 2025 at 7:02 PM
Reposted by Daniel Scher
atmmathematics.bsky.social
Look at this! Taken from Satisfraction, the new book from @profsmudge.bsky.social which is available to order now.

atm.org.uk/Shop/Satisfr...
March 22, 2025 at 8:19 PM
Reposted by Daniel Scher
johngolden.bsky.social
Mostly encouraging www.npr.org/2025/03/17/n...
How Alabama students went from last place to rising stars in math
Alabama is the only state where 4th-grade math scores are higher now than they were in 2019, before the pandemic. This is the story of how the state pulled it off.
www.npr.org
March 18, 2025 at 7:49 PM
Reposted by Daniel Scher
karencampe.bsky.social
New blog post! "Marvelous Midsegments" Go For Geometry! Episode 5.
Activities exploring on all technology platforms: Desmos, GeoGebra & TI calculators.
Taking the scenic route 😉
#geometry #MTBoS #iTeachMath #MathsToday

karendcampe.wordpress.com/2025/03/16/g...
Go For Geometry! 5
Using Dynamic Technology to Build Understanding ◊ Episode 5: Marvelous Midsegments ◊ Welcome to Episode 5, where we take the scenic route in our geometry journey. What happens when we find midpoint…
karendcampe.wordpress.com
March 17, 2025 at 12:31 PM
Reposted by Daniel Scher
learningmaths.bsky.social
I’ve just looked up the ppt - the task I used was from @profsmudge.bsky.social’s Algebradabra book - here’s the slide (I can’t get Bluesky to insert a screenshot so this is a low tech version!)
March 1, 2025 at 8:16 AM
Reposted by Daniel Scher
stfj.net
I am incredibly stoked for CMYK games new series of minimal and awesome card games — Fruit Fight sounds very fun and I cant wait to try all of them.

Group games of this size are always my favorites

www.cmyk.games/collections/...
Magenta
CMYK’s new collection of card games. In a world of increasing digital distractions, Magenta is set to revive a classic way we gather and play – making face-to-face connections through card game nights...
www.cmyk.games
February 27, 2025 at 10:11 PM
Reposted by Daniel Scher
profsmudge.bsky.social
Arriving at Easter....
February 16, 2025 at 7:00 PM
danielscher.bsky.social
Title page from my collaboration with Bugra Giritlioglu. We're reviewing the page proofs now for our book of translated Turkish poetry. Coming this April from Syracuse University Press. press.syr.edu/supressbooks...
February 1, 2025 at 3:20 AM
Reposted by Daniel Scher
mathmatize.bsky.social
Wow...they really banned it 😭

#MathSky #ITeachMath
A page of a calculus textbook showing an example of using L'Hopital's rule. On the page is a popup with text "Sorry, L’Hôpital’s rule isn’t available right now. A law banning L’Hôpital’s rule has been enacted in the U.S. Unfortunately, that means you’ll need to find another method. Calculus students are eagerly working to get L’Hôpital’s rule reinstated. Please stay tuned! Learn more. Close"
January 19, 2025 at 3:20 PM
Reposted by Daniel Scher
segarrogers.bsky.social
A starter for my class who have had one lesson of C≈3.14×d. 'Measure the diameter of each circle and calculate the circumference ... and stop bending the rulers.'
#UKMathsChat #iTeachMaths
Four diagrams involving circles but with parts of the circumferences obscured so that it's not physically possible to measure the diameter. Pupils can however measure radii and use reasoning to determine the required diameters.
January 17, 2025 at 5:51 PM