One Best Thing: Strengthening Number Sense Skills with Global Math Task Tech Challenges


Connecting to share the learning continues to be a passion of mine. I love to connect with teachers to share ideas and activities, but connecting students to share the learning with an authentic audience is super rewarding for me! The Global Math Task Tech Challenge has been an ever evolving #onebestthing project that helps me to do both!


Website: X(Twitter):

Using Google Slides to create a "website" has helped make designing the math challenges easier and faster to share with others. GMTTC has gone through several updates since first designing the project in 2015. For the 2024 new year, I used Microsoft Designer and my love of Legos to design a new character for the logo image of the challenge. Teachers can find the number challenges on the project's X(Twitter). 

Using the amazing Seesaw Learning Journal platform, I now create Seesaw Activities that make it even easier for teachers to share the Global Math Task Challenges with their students. The link to the challenge is included in the X(Twitter) post each time. However, teachers can easily search the Seesaw Community Library using the #gmttc hashtag to find all of the newly shared challenges. 


  Students can work independently or in groups to find solution paths for the challenges. I LOVE how amazed they are when they discover that many times there is more than one way to create a solution for the target numbers. The ability to manipulate the numbers and math operations with discussions on how they found the solutions help develop critical number sense skills. 


Follow @globalmathtask on X(Twitter) to help share strategies and solutions to build stronger number sense skills in your students!

Call to Action: Have you ever participated or had your students explore the Global Math Task Tech Challenges? How do you think they might help your students share math strategies and build number sense skills? I'd love to hear your thoughts in the comments below. Reach out if you have questions. I'd love to help!

Have an amazing day! Heidi

@swampfrogfirst on X(Twitter)


All Replies

Posted on January 17, 2024

Heidi, I wanted to tell you how much my students and I loved GMTTC back when I was a fifth grade math teacher. I have not been a classroom teacher since 2017 and reading your post took me right back to room B112. We loved hosting, and solving, and everyone took it very seriously - we were probably some of your most active participants during those first two years 2015-2017 - our old Twitter handle was @cavesclass and it was probably what I used Twitter for the most back then. Thank you for all of the work that goes into that and for how long it has been running. Truly amazing!


Posted on January 17, 2024

Hi Heidi,

Thank you so much for sharing your resources, they look amazing and I have never used the Global math task tech challenges before but now I will! Thanks again!


Posted on January 31, 2024

Yeah! Let me know if I can help in any way!

Posted on January 31, 2024

So much fun! Thanks for connecting and sharing!

Posted on January 20, 2024

This looks wonderful, Heidi! 🌟 Congrats on publishing your One Best Thing project! 👏

Posted on January 31, 2024

Thank you!

Posted on February 01, 2024

This is awesome! I am going to add this to my list of resources for my question of the day. Thanks for sharing!

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