Doing some fraction review with our proportional reasoning in summer #algebra . Myreon proposed a brainbuster for equivalents to 3/4. (Problems docs.google.com/document/d/1...)

Trying to make mini-vignettes for the Standards of Mathematical Practices. Feedback welcome and appreciated! Comments should be turned on. docs.google.com/document/d/1...

Math Game Monday: Area Battle This game pushes students to consider area and perimeter beyond the basic shapes. #homeschooling #mathgame #letsplaymath #mtbos #iteachmath

@jamesenge.bsky.social foxtrot.com/2026/07/19/l...

UPDATE: We were really looking forward to seeing you today. Unfortunately because life has a way of interfering with plans, we have to postpone today’s collab. Folks have reached out to say that meeting on Sunday is challenging, so beginning in August, we will meet on the 3rd Thursday of the month.

#fractiontalk images which mostly I made docs.google.com/document/d/1... (collected for colleagues)

Blog post about a lesson I loved this week, inspired by graphing stories mathhombre.blogspot.com/2026/07/math... #iteachmath

Blog post about a lesson I loved this week, inspired by graphing stories mathhombre.blogspot.com/2026/07/math... #iteachmath

@deltadc.bsky.social @thenanoprobe.bsky.social #wcgw

I'm very pleased to announce that CSULB's Department of Math&Stats is hiring an Assistant Prof of Math Education for Fall'27! careers.pageuppeople.com/873/lb/en-us... @joinmaa.bsky.social @rume-sigmaa.bsky.social @amtenews.bsky.social @nctm.org @todos-math.bsky.social @awm-math.org #NAM #AMATYC

Thanks! I love doing this. You can see a lot more in my @geogebra.org profile www.geogebra.org/u/alegallard...

#rationalcats what should they name the kitten?

#mathart #IGP resource patterninislamicart.com via @alegallardo28.eurosky.social with his cool @geogebra.org www.geogebra.org/m/mxrs4egj

Qualitative graph bellringer, by Malakai

New post: I quote @mpershan.bsky.social extensively, and insert links and comments. Designing Great Lessons: blog.mathed.page/2026/07/12/d... #mtbos #iteachmath #mathed

Dragons, Gryphons, and Math Mistakes --- Few people realize that a math test is also a test of reading comprehension. #mtbos #homeschooling #letsplaymath #iteachmath #mathjournal

#hexagon in the wild www.nytimes.com/2026/07/10/a... #mathart? #ewww

kind of fun [i goofed on the 12345, i forgot the parenthetical is a subtraction] 54 + 2(1-3) --> 12345 46 + 2(5-3) --> 23456 47 + 3(6-5) --> 34567 first glance at 45678 and 56789 don't seem like there are solves #algebra

Hey! I wrote something about teaching and Dan wrote something back. What year is this, 2012? (Read Dan's thing, it's interesting.)

cool. yeah wasn't sure what level you were working with, so didn't know if you were allowing negatives in the parenthetical. looks like there are multiple solves here. anyone come up with a consecutive collection solve? something like 45 + 1(3 + 2) (so we use 1, 2, 3, 4, 5)

Paying someone $5.6M from your $2.2B 2026 income is like a median US worker paying how much from their $67K salary?

Always looking for the @ddmeyer.bsky.social graphing stories. Here's a repository: graphingstories.scolab.com Wondering about ones that students could perform for each other. Head height from ground, distance from a wall... what else would be observable in group and continuous?

56+1(3-9) is that how it's done?

Interesting discussion explicit instruction vs productive struggle @nctm.org my.nctm.org/discussion/e... #iteachmath

Okay, so i was right and there are multiple ways to reach exactly 50... 14+6(8-2) 14+6(9-3) I like it, but I feel like usually open middle problems half the battle is "how do you know you're closest?"

Cool! 1000 year old Mayan mathematician attribution www.theartnewspaper.com/2026/07/13/n... #mathhistory via @walthickey.bsky.social

Should have tagged @tomrocksmaths.bsky.social !

Great #mathhistory video from Tom Crawford with Snezana Lawrence www.youtube.com/watch?v=f2s7... including some discussion of women mathematicians.

Getting some nice learner thinking from an #openmiddle problem: Get as close to 50 as possible in __ __ + __ ( __ – __ ) with 1, 2, 3, 4, 5, 6, 7, 8, 9 and no repeats. #algebra

Great #mathhistory video from Tom Crawford with Snezana Lawrence www.youtube.com/watch?v=f2s7... including some discussion of women mathematicians.

For summer #algebra I've been slow rolling #visualpatterns. But it's time to introduce covariation! docs.google.com/document/d/1...

. @teorth.bsky.social working outacceptable uses of AI, and a neat visualization tool for a new paper. terrytao.wordpress.com/2026/07/11/o...

In grad school we got obsessed with duplicating mass produced food. Pop tarts always defied us. But we did want something you could put in a toaster, which I don't think you could with these. cooking.nytimes.com/recipes/1025...

Game theory fable. www.futilitycloset.com/2026/07/11/t... Me, I'm picking 100 or 99 and hoping tit for tat applies.

Love this #tessellation #visualpattern from Ghee Beom Kim www.tumblr.com/mathhombre/8... #mathart

I wrote about how @hpicciotto.bsky.social makes such wonderful (and useful) mathematical activities. substack.com/home/post/p-...

People often forget the subfactorial, which seems like a perfectly legitimate option to include if we're allowing regular factorials. !4=9, which opens the door to quite a lot of useful values.

See also this for a very different perspective: davidkbutler.xyz/2019/06/01/t...

I don't understand how pride comes into it. If I had emigrated, chosen this country, then I can see pride being merited. (Exactly the people they don't want.) I was just born here and stayed.

Some thoughts: loopspace.mathforge.org/CountingOnMy...

thinking about proportions #visualpatterns

Wondering about this as a problem type. Add in parentheses to make the biggest/smallest result possible: 1–2–3/4+5x6+7 Any interest? Any good expressions for it?

Some creative four 4s thinking. Is root fair? What about Beremiz’s 44s? (I do to encourage parentheses use) #algebra

An illustration highlighting both the geometry of the motion of a spinning top in physics, as well as the descriptive geometry construction used to depict it. Colored pencils (Polychromos, Albrecht Dürer) of black paper. #sciart #physics #mathsky #geometry

This could be an interesting board game design. (11,12). Circle packing along logarithmic spirals with filling of sets of two circles and the void between them. #CreativeCoding #MathArt #MathSky #phyllotaxis #SciArt

great math in real life story. www.tumblr.com/vacuously-tr...

Found it.

Working on number flexibility (anyone have a better term?) in summer #algebra

great teacher story www.tumblr.com/vacuously-tr...