#gmttc is the official hashtag for the Global Math Task Twitter Challenge. Classrooms around the world are invited to participate by solving the problems that are tweeted and/or tweeting out their own. You can formally sign on to be a #gmttc tweeter on this spreadsheet, but this is not a requirement. It is easy enough to find recently tweeted tasks for your grade level by doing a search for #gmttc with your grade level number at the end. For example, #gmttc4 will provide you with recent 4th grade challenges.
I enjoy seeing the variety of images students use to present the math problems, and your students will begin to make connections between what they are learning compared to students in other parts of the world. This is a quick, no fuss way to “flatten the classroom.” As a whole-class, center, or extension activity, #gmttc is a fun idea to help students get excited about math!