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Dan Wekselgreene

@dwekselgreene.bsky.social
780 followers 820 following 223 posts

Husband/father of 3, HS math teacher / Desmos Fellow, SF Bay Area, old school #MTBoS member, working to create math classes that build agency and ownership for marginalized students. Always drinking #tea. #BuildingThinkingClassrooms. #ITeachMath #EduSky

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Dan Wekselgreene @dwekselgreene.bsky.social · 24/09/2026
I wanted to give my algebra 2 students something to do with complex numbers beyond computing, but not needing trig, e, etc. So I made this set of tasks to explore connections to geometric transformations. I think they got a lot out of it! #iteachmath #mtbos drive.google.com/file/d/1IMGt...
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
Yes, it's been very helpful! I've also been using the Algebra 1 Lab Gear manual lessons/activities.
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
And Flip and Slide: classroom.amplify.com/activity/622...
classroom.amplify.com
Flip and Slide Game version 2.0 (Rigid transformations practice)
This is a recreation of an old Flash game at https://www.nctm.org/classroom-resources/Calculation-Nation/ Students strategically use rigid transformations to pop as many bubbles as possible in a set ...
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
And if you mean geometry, there's transformation tetris classroom.amplify.com/activity/658...
classroom.amplify.com
Transformation Tetris
@dwekselgreene @dwekselgreene@bsky.social
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/65d...
classroom.amplify.com
Transformation Blobs
This is a Desmos version of Green Globs. Students choose a parent function and then write a transformation of that function. The goal is to hit the 20 randomly scattered targets. The score for each...
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/661...
classroom.amplify.com
CYU 5-7: Function Transformation and Translation Practice (Math 3)
by Daniel Wekselgreene
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/661...
classroom.amplify.com
CYU 5-5: Vertical Scale Factors - Function Transformation (Math 3)
Practice with vertical transformations of functions in multiple representations, with review of translations @dwekselgreene.bsky.social
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/660...
classroom.amplify.com
CYU 5-3: Translations and Vertical Reflections (Math 3)
Practice with translations of functions in multiple representations, as well as vertical reflection @dwekselgreene.bsky.social
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/65f...
classroom.amplify.com
CYU 5-2: Horizontal Translations (Math 3)
Practice with horizontal translations of functions in multiple representations. Featuring: Desmos's Cannon Man, remixed, part 2. @dwekselgreene.bsky.social
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/65f...
classroom.amplify.com
CYU 5-1: Vertical Translations (Math 3)
Practice with vertical translations of functions in multiple representations. Featuring: Desmos's Cannon Man, remixed. @dwekselgreene.bsky.social
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/65e...
classroom.amplify.com
Graphing Transformations of Parent Functions
Students graph `af\left(b\left(x-h\right)\right)+k` given a parent function of either `y=x^{2}`, `y=x^{3}`, `y=\sqrt{x}`, or `y=\left|x\right|`. This activity provides repeated practice and individua...
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
classroom.amplify.com/activity/663...
classroom.amplify.com
Multiple Function Transformations
Visualization of successive function transformations @dwekselgreene
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/09/2026
I have quite a few things I've used over time: classroom.amplify.com/activity/652...
classroom.amplify.com
Parent Functions: Translation & Transformation
This activity is for students to practice transforming/translating parent functions. There is one screen with repeated random practice where you can choose the parent function as well as which parame...
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Dan Wekselgreene @dwekselgreene.bsky.social · 09/09/2026
Finally got a few sets of @hpicciotto.bsky.social ‘s Lab Gear and introduced it in #MathsToday. You can do a lot more than with standard algebra tiles. Looking forward to trying the various explorations and activities to see what emerges. Does anyone else here use these? #iteachmath #mtbos
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Dan Wekselgreene @dwekselgreene.bsky.social · 09/09/2026
Oh, I used that with my class last year! There are some great problems in that book.
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Dan Wekselgreene @dwekselgreene.bsky.social · 05/09/2026
Here's an example connecting tree diagram and parsing marks.
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Dan Wekselgreene @dwekselgreene.bsky.social · 05/09/2026
IB introduced me to "factorize" as a verb and I'm never going back.
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Dan Wekselgreene @dwekselgreene.bsky.social · 05/09/2026
In algebra 2, we've been working on analyzing the term/factor structure of sub-expressions (using tree diagrams and parsing marks). Students are doing well! On Tuesday, we'll layer in the distributive property and how it supports transformation in either direction. #mtbos #iteachmath
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Dan Wekselgreene @dwekselgreene.bsky.social · 27/08/2026
For sure. I’m thinking about using them for parameters to show function transformations.
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Dan Wekselgreene @dwekselgreene.bsky.social · 27/08/2026
For colors I was thinking of combining that with lists and trig functions, to show how to make a wavy flag, like some of the pride flag examples. That has a pretty good wow factor!
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Dan Wekselgreene @dwekselgreene.bsky.social · 27/08/2026
I’m designing a workshop series (3 1-hour sessions) for 11th & 12th graders to show how to use @desmos.com for exploring, problem solving, and creating, not just graphing. I have ideas for what to prioritize but I’d love to hear what others would focus on in or do in that time. #mtbos #iteachmath
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Dan Wekselgreene @dwekselgreene.bsky.social · 12/04/2026
I just listened to this. What a fantastic set, and excellent sound quality. Just learned about this collection and looking forward to digging in.
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Dan Wekselgreene @dwekselgreene.bsky.social · 14/02/2026
“Yet, what is any ocean but a multitude of drops?” David Mitchell, Cloud Atlas
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Dan Wekselgreene @dwekselgreene.bsky.social · 14/02/2026
🫏😋👜
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Reposted by Dan Wekselgreene
Dan Lewis @4301maths.bsky.social · 06/01/2026
It’s not quite what @dwekselgreene.bsky.social is doing, but inspired by a general idea, put these together for expanding and collecting like terms #MathsToday #ukmathsteachers
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Dan Wekselgreene @dwekselgreene.bsky.social · 23/12/2025
Progress pic:
Two dolls with homemade party hats on
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Dan Wekselgreene @dwekselgreene.bsky.social · 23/12/2025
My 6 yo is always busy with projects. Currently, she is designing party hats for her dolls. I told her it was really impressive and she said “what? I’m just cutting out triangles, rolling them up, and taping them.” I asked her how she knew to do that and she said “I just saw it in my head.” #tmwyk
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Dan Wekselgreene @dwekselgreene.bsky.social · 22/12/2025
That’s a funny read. Since my school teaches IB, I’m pretty familiar with most of these already (invigilating, factorising, etc) but I am happy to now understand what “standard form” refers to, because I was confused by that in some other posts I saw.
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Dan Wekselgreene @dwekselgreene.bsky.social · 21/12/2025
Oh, got it. I’ve only seen “sequence”, not “progression”.
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Dan Wekselgreene @dwekselgreene.bsky.social · 21/12/2025
What’s an AP?
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Dan Wekselgreene @dwekselgreene.bsky.social · 21/12/2025
with case 100 fully drawn out on several pieces of graph paper taped together. She was so proud of herself! My point is just that sometimes our initial idea to get them to see structure doesn’t work, and we then need to go back and rescaffold the approach.
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Dan Wekselgreene @dwekselgreene.bsky.social · 21/12/2025
Yes, definitely! But sometimes our lesson just doesn’t work because they aren’t seeing what we see in the problem. I was doing the stair-step pattern a while back (1 + 2 + 3 + … + n) and trying to get students to find a way to count the number in case 100. A kid went home and came back the next day
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Dan Wekselgreene @dwekselgreene.bsky.social · 20/12/2025
I think students will often pick a brute force method that they know, even if it is tedious, over trying to figure out a new approach.
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Dan Wekselgreene @dwekselgreene.bsky.social · 19/12/2025
Alternatively, they could use manipulatives to build 5 groups of 3 and remove 4 groups of 3, etc. Or draw pictures.
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Dan Wekselgreene @dwekselgreene.bsky.social · 19/12/2025
Since there was some gain with 7(12)-6(12), maybe have a thinly-sliced set that starts with numbers that are small and easy to do mentally and have it gradually move to larger numbers, and have it end with problems that slowly add in variables like 8(n) - 7(n) and such.
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/12/2025
Hmm.. I wonder what would happen if you gave them a set of like 20 problems in that format and told them they had to do the whole thing without a calculator. Maybe after grinding through a few they would start to notice/wonder about how to speed up the process and think structurally?
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Dan Wekselgreene @dwekselgreene.bsky.social · 18/12/2025
Sure, of course.
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Dan Wekselgreene @dwekselgreene.bsky.social · 17/12/2025
I just made a few more of these equation puzzles. drive.google.com/file/d/1uEzw... #iteachmath #mtbos
Image of a math equation puzzle where a linear equation in x is shown, along with the work to solve it, but many of the terms are blanked out for students to figure out.
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Dan Wekselgreene @dwekselgreene.bsky.social · 14/12/2025
The ones who like puzzles generally like it. I think I’ll try to write some more and try them with my students this year. I need to make some easier so I can do it as a set of thinly sliced problems instead of just using it as a challenge.
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Dan Wekselgreene @dwekselgreene.bsky.social · 12/12/2025
I do like open middle, but this is different, in that there is only one possible solution. It's like a puzzle that forces you to look backward and forward across the work to find the missing pieces.
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Dan Wekselgreene @dwekselgreene.bsky.social · 12/12/2025
No, I haven't seen it. Looks like a good resource, thanks!
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Reposted by Dan Wekselgreene
Catriona Agg @catrionaagg.bsky.social · 11/12/2025
Y12 started graph transformations today, so to warm up we did these function notation completion table. I had a lot of fun constructing this task, especially making the second table so that as many cells as possible could be filled. #MathsToday #ALevelMaths
Two completion tables with rows for x, f(x) and then a variety of transformations of f(x). In the first table, the top two rows are filled in. In the second, the first row and various other cells are filled in. The task is to complete as much of the table as possible. Answers to the previous task. In the bottom row, one of the values has been changed to 66. Some cells are blank, because it’s not possible to fill them from the information given.
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Dan Wekselgreene @dwekselgreene.bsky.social · 11/12/2025
I made these problems years ago, and have been recycling them since. Does anyone know of a place where more like these could be found? It's time consuming to make good ones. #iteachmath #mtbos drive.google.com/file/d/1qfM3...
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Reposted by Dan Wekselgreene
Adrienne Hestenes @ahestenes.bsky.social · 08/08/2025
Had an extra day with one class compared to others today, so we tried out a @mathforlove.bsky.social activity “Squarable Numbers”. Had 100% participation and lots of good discussion. #iTeachMath #MTBoS mathforlove.com/lesson/squar...
Students work on graph paper showing her square disections into smaller squares.  Photo shows a students work on a mini whiteboard.  A 9 by 9  square is drawn and students is dividing it into smaller squares.
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Dan Wekselgreene @dwekselgreene.bsky.social · 09/08/2025
Nice! This looks like a good problem - I may try it next week. What grade level did you do this with? How far did they get into the generalization?
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Dan Wekselgreene @dwekselgreene.bsky.social · 24/07/2025
Immediately followed up in the next room with this unsettling clock.
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Dan Wekselgreene @dwekselgreene.bsky.social · 24/07/2025
I’m staring at this chair in a waiting room. The more I look at it, the more it’s making me feel agitated. Is it just me? #mtbos #iteachmath
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Reposted by Dan Wekselgreene
DavidPetro314 @davidpetro314.bsky.social · 20/07/2025
[New Post] Ontario Math Links-My favourite #math related links from this week: ontariomath.blogspot.com/2025/07/math... Links & help from @jennalaib.bsky.social @howiehua.bsky.social @kurt-salisbury.bsky.social @dwekselgreene.bsky.social @theericklee.bsky.social & more #MathChat #MTBoS #iTeachMath
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Reposted by Dan Wekselgreene
Desmos Studio @desmos.com · 16/07/2025
Me? Typos? Never… When you save your graph, the link now automatically updates with your latest saved edits. Learn more about saving and sharing your graphs in the Desmos Help Center: help.desmos.com/hc/en-us/art... #iteachmath
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Reposted by Dan Wekselgreene
Anna @ampacura.bsky.social · 17/07/2025
Math + Mom + Books + Life: I really am a Desmos Fellow! mathmomlife.blogspot.com/2025/07/i-re... #mtbos #iteachmath #mathchat #desmos
mathmomlife.blogspot.com
I really am a Desmos Fellow!
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