Tag Archives: math

Clothesline Math

Chris Shore is quick to note that he did not invent Clothesline Math.  However, he is the author of the Clothesline Math website, and producer of many of the materials on the site, so I think he definitely deserves some credit!

When I first ran across this site, I was a bit dubious of the value of a Clothesline Math activity.  Basically, the teacher gives out a set of number tents to students, who then must hang them on a clothesline (which represents a number line).  However, once I watched Shore’s video explaining how he introduces Clothesline Math, I realized how this seemingly simple activity could really start some incredible math class discussions.  There are many decisions students need to make when they determine what benchmarks to use on the numberline, the order to place their numbers, and the amount of space in between.  Even with a set of 3 fractions (1/2, 1/3, and 1/4), you could take up an entire class period.

Shore provides different sets of printable numbers (from various math disciplines) and an answer document on his site.  Of course you can DIY with your own supplies and number sets based on whatever you are studying in math class at the moment.

I like the idea of students reasoning through this, and having to justify their responses.  It can also be a great visual and kinesthetic activity that will be much more meaningful that choosing from multiple choice answers on a worksheet.

For more intriguing math sites, take a look at 15 Math Sites That Won’t Make You Fall Asleep.  Let’s get our students excited about math!

image from: MaxPixel

Robert Kaplinsky’s Real World Problems

Robert Kaplinsky uses images from everyday life to pose interesting math challenges for students in Kinder through high school.  You can choose problems by grade level on his site, or you can look at this spreadsheet that identifies the Common Core Standards covered in each problem.

Questions like, “How Many Combos are there on a Coke Freestyle?” are sure to elicit curiosity from your students.  Kaplinsky shares the image, a challenge, questions to be asked by the teacher to encourage discussion, and background information regarding the facts and the math related to each image.

Robert’s site inspired me to look for some other free images that might spawn some intriguing math questions, and I found this one on Pixabay:


Can you think of math questions for your own students that would correlate to this picture?

By the way, I’ll be adding this to my, “15 Math Sites that Won’t Make You Fall Asleep” post – which will actually make the current number of recommended sites 17 at this point 😉

PBS Cyberchase Games

When my Kinder GT class learns about “Scientist Thinking” and classification, I like to use a PBS Cyberchase Game called, “Logic Zoo,” which helps them to understand Venn Diagrams.  You can find that game, and other fun math problem solving interactives for elementary and middle school students on this page.  (You need Flash to play these games, so they probably don’t work on mobile devices.) In addition to “Logic Zoo,” I love, “Pour to Score,” and, “Cyberchase Squares.”

The games are many different levels, so make sure you test them out before assigning them to your students!

Logic Zoo
Screen Shot from PBS Cyberchase game, “Logic Zoo”

Frog Jumping

Gordon Hamilton is the amazing mind behind one of my favorite math sites, Math Pickle. (For a list of interesting math sites, check out this post.) Numberphile is an awesome YouTube channel for anyone passionate about math.  So, when the two collaborate, you know that it is going to be good.  “Frog Jumping” is one of Hamilton’s recent math challenges featured on Numberphile. I would definitely invite your students (probably 3rd grade and up) to try each problem he poses throughout the video – pausing for them to make their attempts. As for his final frog-jumping challenge, I may have to take him up on it, although it’s hard to imagine that I could solve something that eludes Gordon Hamilton!

Frog Jumping
screen shot from “Frog Jumping” video by Gordon Hamilton and Numberphile

15 Math Sites That Won’t Make You Fall Asleep

My students, especially my 4th and 5th graders, love math challenges.  If I can, I find ones that don’t show the answer so we can all try to figure them out.  I think it’s good for the students to see me struggling (and I really do!), and how I handle frustration over particularly devilish problems.  Last week, my 5th graders and I spent a good 30 minutes on this “easy” problem on Steve Miller’s Math Riddles page. (Technically, they had an excuse since they hadn’t exactly learned the math skill needed to solve the problem – yet.)

If you are looking for some unique math problems that will feel more like brainteasers than standardized test practice, here are some sites that I haven’t mentioned before:

And here are some that bear repeating (*sites include activities for primary grades, K-2):

With more and more articles coming out every day about the importance of modeling a good attitude toward math (like this one and this one), it seems kind of as simple as 1+1=2 to come to the conclusion that the people who have fun doing math will be more inclined to do it more often.

UPDATE 4/26/17 – I can’t believe I forgot to include this one: Estimation 180. So, there’s a bonus for you!

UPDATE 5/8/17 – I may have to change the title of this post soon because I keep finding more great sites!  Here is another one: Robert Kaplinsky’s Real World Problems.

image from: fdecomite on Flickr

The Hidden Secret to Understanding the World

In my 4th grade gifted and talented class, the students study masterpieces.  In addition to masterpieces of visual art, we talk about literary, musical, and even mathematical masterpieces.  When I saw the title for Roger Antonsen’s TED Talk, “Math is the Hidden Secret to Understanding the World,” I thought it might fit in well to the mathematical masterpiece section.  Little did I expect that it would tie everything together that we had discussed all year.

I should mention that this year’s 4th grade class has some very passionate mathematicians in it.  They worship Pi, see Fibonacci in everything, and sit on the edge of their seats whenever I mention that a math activity is imminent.  But I wasn’t sure they would find Antonsen’s talk as revolutionary as I do.  I was willing to overlook the mathematical examples that were over my head in exchange for appreciating the bigger picture, but would they?

Fortunately, Antonsen’s visualizations managed to maintain their focus, and even their awe at some point, as he gradually brought his audience around to the idea that mathematical equations and representations are actually different perspectives (a few heads raised a bit whenever he said this word, as we regularly talk about multiple perspectives).  The “a-ha” moment, however, was when Antonsen said this, “So let’s now take a step back — and that’s actually a metaphor, stepping back — and have a look at what we’re doing. I’m playing around with metaphors. I’m playing around with perspectives and analogies. I’m telling one story in different ways. I’m telling stories. I’m making a narrative; I’m making several narratives. And I think all of these things make understanding possible. I think this actually is the essence of understanding something. I truly believe this.”

There were audible exclamations in my class when the word, “metaphor,” was used.  We started the year by learning about figurative language.  And the concentration in 4th grade in Texas is on Writing as it is tested at this level for the first time.  So, looking at math as a way to tell stories and show different perspectives really captured the attention of my students.

I often tell my students about my childhood struggles with math, how I was often congratulated on my writing skills but made holes in my math assignments due to all of the erasures.  It wasn’t until high school that I had a few great teachers who taught me to love math and helped me to see that my only obstacle had been my own fear of the subject.

Screenshot 2017-04-04 at 8.35.25 PM
from Roger Antonsen’s TED Talk

If I had seen Antonsen’s TED Talk when I was in 4th grade, things could have been different for me far sooner.  Instead of feeling like math divides people into those who can and those who can’t, I might have realized that math is actually the language that brings us all together.

Word Mandalas

I am such a geek.  Last night, I was researching mandalas for an upcoming lesson with my 4th graders.  I remembered that Richard Byrne had just published a post about a new online magazine creator, so I thought it might be fun to try it out and let my students collaborate on the magazine.  Then, I started looking for images to put on the magazine cover, and came across a mandala that used words instead of symbols.  There was no information on how it was created, so I did a search for word mandalas – and that is how I landed on Mandific. (I still haven’t discovered how the original word mandala picture I found was made, but that’s okay.)

Type a word into Mandific, and it will create a mandala for you using the letters of the word.  You can adjust the color, the spacing of the letters, and the design.  See if you can figure out my word in the mandala below.

mandalaword art
Word Mandala created with Mandific

H/T to GeekMom for sharing this tool on a blog post.

Then, I continued my search (I won’t tell you how long I spent on Mandific before remembering my actual mission.) I found MyOats.com.  Still not exactly what I was looking for, but it gave me another alternative for including words in a mandala.

Created with MyOats.com

As you can see, I didn’t spend a lot of time on that one because I had suddenly become obsessed with finding the perfect word mandala generators.

My next attempt was with using the word cloud generator, Tagul.

Word Cloud
Made with Tagul

I also tried Tagxedo, which will allow you to upload your own image to make into a word cloud. However, I had so many problems with it not loading correctly on three different browsers, that I finally moved on to some iPad apps.

WordFoto has always been a favorite of mine.  I uploaded a photograph of a mandala from the web, and then added some text. If you are not familiar with WordFoto, here is a post I wrote about the app.

Photo Mar 22, 7 21 43 PM
created with WordFoto app

My last word mandala attempt was created with the TypeDrawing app. I uploaded a mandala photo, and then traced the main lines with words and some of the symbols offered in the app. After completing my drawing, I changed the photo opacity setting so that only my drawing shows. I have to say that this was my favorite creation.

Photo Mar 22, 7 46 23 PM
created with TypeDrawing app

Photo Mar 22, 7 44 12 PM

I will keep you posted on what we use! If you have any other ideas for word mandalas (that don’t require expensive software like Photoshop), please let me know in the comments below.