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**Karen Campe** @KarenCampe@mathstodon.xyz · 3d

Karen Campe @KarenCampe@mathstodon.xyz

Solutions are posted for the May Calendar of Problems!
No calendars for summer months, but enjoy some #ProblemSolving fun with past calendars anytime!
#RecreationalMath #iTeachMath #MTBoS #MathChat #MathEd #MathsEdChat #ClassroomMath

https://karendcampe.wordpress.com/2025/05/01/may-calendar-problems-3/

Reflections and Tangents · May 1May Calendar ProblemsSpring is here, and I’m sharing the May Calendar for some problem solving enjoyment in the last stretch of your school year. This is the May 2019 Calendar of Problems from 6 years ago for you…

Continued thread

**Karen Campe** @KarenCampe@mathstodon.xyz · May 19

May 19

Karen Campe @KarenCampe@mathstodon.xyz

Today's #geometry problem from May calendar is 1 of a few related problems (I like how this month has several sets that relate to/build on each other)
Tell us how you thought about it; check out whole calendar @ link above.

Given square ABCD with midpoints M and N of their respective sides. Determine the area of triangle EFG in terms of k, the length of a side of the square.

#MTBoS #iTeachMath #ClassroomMath

Continued thread

**Karen Campe** @KarenCampe@mathstodon.xyz · May 8

May 8

Karen Campe @KarenCampe@mathstodon.xyz

The May 8 problem is one of a few this month involving "petals" created by overlapping arcs of circles.

Try this fun #geometry problem & tell us how you thought about it.
#ProblemSolving #MathEd #MathsEdChat #RecreationalMath #MTBoS #iTeachMath #ClassroomMath

Check out the whole calendar at link above ^^

The length of the radius of circle O is 4•sqrt2
Four intersecting congruent semicircles form the 4 shaded regions. Find the area inside O and outside all the shaded regions. [The image shows 4 shaded "petals" centered at O and having their tips on the circle]

Continued thread

**Karen Campe** @KarenCampe@mathstodon.xyz · May 7

May 7

Karen Campe @KarenCampe@mathstodon.xyz

Such fun to put together this month's Carnival of Math post!
Thanks to:
@drMathArt
@tao
@johndcook
@JimPropp
@divbyzero Joel David Hamkins
@icecolbeveridge
@stecks
@TMiP
@aperiodical
@carnivalofmaths
@grant
James Tanton
Chris Smith
Zack Wissner-Gross
Peter Cameron
Gil Kalai
@joshg
Mark Willis
Annie Forest
@jennalaib @davidwees
@mathhombre
@dylankane
Sara Van Der Werf
Ben Orlin
Mark Willis
Kurt Salisbury
Brad Ballinger
David Renshaw

Check out the whole post, link above ^^

#MathChat #MathEd #MathsEdChat

**Karen Campe** @KarenCampe@mathstodon.xyz · May 6

May 6

Karen Campe @KarenCampe@mathstodon.xyz

New blog post: 239th Carnival of Mathematics!
Recapping math/maths/mathEd content from April.
#MTBoS #iTeachMath #MathChat #MathEd #MathsEdChat #RecreationalMath

https://karendcampe.wordpress.com/2025/05/05/carnival-of-mathematics-239/

Reflections and Tangents · May 5Carnival Of MathematicsWelcome to the 239th installment of the Carnival of Mathematics, a roundup of interesting mathematics content from April 2025. The Carnival is a monthly post hosted by a different blog each month. …

**Karen Campe** @KarenCampe@mathstodon.xyz · May 3

May 3

Karen Campe @KarenCampe@mathstodon.xyz

Hello #Math folks. I'm trying to remember a problem I thought I saw here recently (but can't find)
Something like this:
A, B prime
P < 300
Find all possible A, B, P such that
A^2 + B^2 = P
Can anyone point me to the post/source? Thanks.
#iTeachMath #MathsEdChat

**Karen Campe** @KarenCampe@mathstodon.xyz · May 1

May 1

Karen Campe @KarenCampe@mathstodon.xyz

The May Calendar of Problems is here! Enjoy some #Math #ProblemSolving in the home stretch of your school year!

Plus Bonus Article "Table Techniques" using table of values as dynamic tool w/technology.

#MTBoS #iTeachMath #T3Learns #MathEd #MathsEdChat #ClassroomMath #RecreationalMath

https://karendcampe.wordpress.com/2025/05/01/may-calendar-problems-3/

**Karen Campe** @KarenCampe@mathstodon.xyz · Apr 30

Apr 30

Karen Campe @KarenCampe@mathstodon.xyz

Solutions now posted for April Calendar of Problems!
[Plus check out bonus article if you didn't see it yet ]
May calendar coming tomorrow...
#ProblemSolving #iTeachMath #MTBoS #T3Learns #RecreationalMath #MathEd #MathsEdChat

https://karendcampe.wordpress.com/2025/04/01/april-calendar-problems-3/

Reflections and Tangents · Apr 2April Calendar ProblemsWelcome to April, and I hope you’re ready to spring into some problem solving! Here is the April 2011 Calendar of Problems from 14 years ago for you and your students to try. I have the last …

**Karen Campe** @KarenCampe@mathstodon.xyz · Apr 26

Apr 26

Karen Campe @KarenCampe@mathstodon.xyz

Happy weekend! If you're inclined to do some #ProblemSolving, here's the April Calendar... solutions coming next week! (& May calendar too!)

#iTeachMath #MTBoS #MathEd #MathsEdChat #RecreationalMath
https://karendcampe.wordpress.com/2025/04/01/april-calendar-problems-3/

**Karen Campe** @KarenCampe@mathstodon.xyz · Apr 17

Apr 17

Karen Campe @KarenCampe@mathstodon.xyz

New blog post! "Go For Geometry! Episode 6: Quadrilaterals"
Using technology (all platforms) to make sense of this family of shapes.
#MTBoS #iTeachMath #T3Learns #Geometry
#ClassroomMath #MathEd #MathsEdChat

https://karendcampe.wordpress.com/2025/04/17/go-for-geometry-6/

Reflections and Tangents · Apr 17Go For Geometry! 6Using Dynamic Technology to Build Understanding ◊ Episode 6: Quadrilaterals ◊ In Episode 5, we took a brief look at trapezoids, and that got me thinking about the family of quadrilaterals: all the …

**Karen Campe** @KarenCampe@mathstodon.xyz · Apr 2

Apr 2

Karen Campe @KarenCampe@mathstodon.xyz

The April Calendar of problems is here! Do some #ProblemSolving with your students (or by yourself) & share your thinking!

Plus BONUS article "Do It Right" on implementing technology for success.
#iTeachMath #MTBoS #MathsToday #RecreationalMath #MathEd #MathsEdChat #ClassroomMath

https://karendcampe.wordpress.com/2025/04/01/april-calendar-problems-3/

**Karen Campe** @KarenCampe@mathstodon.xyz · Apr 1

Apr 1

Karen Campe @KarenCampe@mathstodon.xyz

Solutions for the March Calendar of Problems are posted!
https://karendcampe.wordpress.com/2025/03/01/march-calendar-problems-3/
Sorry, I'm a day behind, but the April calendar will be up by tomorrow (no fooling!)
#ProblemSolving #RecreationalMath #iTeachMath #MTBoS #T3Learns #MathEd #MathsEdChat #ClassroomMath

Reflections and Tangents · Mar 1March Calendar ProblemsWow it is March, and spring is on the way! March is among my favorite months, since it has its own math holiday (Pi Day*). But don’t limit your recreational math to 3-14; you can have math pr…

**Karen Campe** @KarenCampe@mathstodon.xyz · Mar 17

Mar 17

Karen Campe @KarenCampe@mathstodon.xyz

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 #ClassroomMath #MathEd #MathsEdChat

https://karendcampe.wordpress.com/2025/03/16/go-for-geometry-5/

Reflections and Tangents · Mar 17Go For Geometry! 5Using 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…

**Karen Campe** @KarenCampe@mathstodon.xyz · Mar 9

Mar 9

Karen Campe @KarenCampe@mathstodon.xyz

New Blog Post! "Go For Geometry! Episode 4: Triangle Angles"
See how to use numerical data w/technology to support student understanding (on all platforms: Desmos GeoGebra TI Calculators)
#geometry #MTBoS #iTeachMath #T3Learns #MathEd #MathsEdChat #ClassroomMath

https://karendcampe.wordpress.com/2025/03/09/go-for-geometry-4/

Reflections and Tangents · Mar 9Go For Geometry! 4Using Dynamic Technology to Build Understanding ◊ Episode 4: Triangle Angles ◊ This is one of the first dynamic geometry activities I ever did with my students. The topic comes early in the school …

**Karen Campe** @KarenCampe@mathstodon.xyz · Mar 2

Mar 2

Karen Campe @KarenCampe@mathstodon.xyz

March Calendar of Problems is posted! Try some #ProblemSolving #RecreationalMath & share thoughts here or on the blog.

Plus BONUS content article: "Math Habits of Mind" Enjoy!
Consider subscribing so never miss a post.
#MTBoS #iTeachMath #ClassroomMath #MathEd #MathsEdChat

https://karendcampe.wordpress.com/2025/03/01/march-calendar-problems-3/

**Karen Campe** @KarenCampe@mathstodon.xyz · Feb 25

Feb 25

Karen Campe @KarenCampe@mathstodon.xyz

New Blog Post! "Go For Geometry Episode 3: Points of Concurrency"
See how this technology exploration can bring challenging math to all levels of students #equity #geometry w/all tech platforms

#MTBoS #iTeachMath #ClassroomMath #MathEd #MathsEdChat

https://karendcampe.wordpress.com/2025/02/25/go-for-geometry-3/

Reflections and Tangents · Feb 25Go For Geometry! 3Using Dynamic Technology to Build Understanding ◊ Episode 3: Points of Concurrency ◊ Perhaps by now you’ve gotten a taste of the power of Dynamic Geometry (DG) systems from the previous two posts. …

**FreeSchool=Wrk & Friendship!** @freeschool@qoto.org · Feb 17

Feb 17

FreeSchool=Wrk & Friendship! @freeschool@qoto.org

"When the glitter fades, what remains?" #QUOTE

**Karen Campe** @KarenCampe@mathstodon.xyz · Feb 10 *

Feb 10 *

Karen Campe @KarenCampe@mathstodon.xyz

Take advantage of valentines candy to explore exponential models with your students!
Check out "I Candy Math" for Valentine's Day this week!
#MTBoS #iTeachMath #ClassroomMath #MathEd #MathsEdChat
https://karendcampe.wordpress.com/2022/02/10/i-%e2%9d%a4%ef%b8%8f-candy-math/

Reflections and Tangents · Feb 11, 2022I ❤️ Candy Math!It’s that time of year again, when Valentine’s Day candy is all over store shelves. Grab some “conversation hearts” – SweeTart™ Hearts are my favorite – and explore exponential models with your stu…

**Karen Campe** @KarenCampe@mathstodon.xyz · Feb 6

Feb 6

Karen Campe @KarenCampe@mathstodon.xyz

It's almost "e day"!!! (2.7)

Get ready for Friday with this blog post: "Exploring e" gives some ideas for learning about the Euler number in math class.

#MTBoS #iTeachMath #ClassroomMath #MathEd #MathsEdChat #calculus #precalculus

https://karendcampe.wordpress.com/2024/02/07/exploring-e/

Reflections and Tangents · Feb 7, 2024Exploring eImage credit: MathIsFun.com Sarah (@mathequalslove)1 tells me that today, February 7, is “e day” because the date is 2-7 in month-day order. You might recall that e is a number sometimes called the…

**Karen Campe** @KarenCampe@mathstodon.xyz · Feb 2

Feb 2

Karen Campe @KarenCampe@mathstodon.xyz

February Calendar of Problems is posted! Try some #ProblemSolving #RecreationalMath & share thoughts here or on the blog.

Plus BONUS content article: "13 Rules That Expire" Enjoy!
Consider subscribing so never miss a post.
#MTBoS #iTeachMath #ClassroomMath #MathEd #MathsEdChat

https://karendcampe.wordpress.com/2025/02/01/february-calendar-problems-3/

Reflections and Tangents · Feb 1February Calendar ProblemsFebruary is here, and even though this month is short, there’s plenty of time for math problem solving and other fun! Besides Valentine’s Day* and E Day**, here is the February 1995 Cal…

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