Over the past 5 years, this blog has seen nearly 3.1 million views.  The most popular strategies from the blog all have one thing in common:  They include downloadable resources and strategies which can be immediately used in the classroom.  They are also free!  I’m sometimes asked these two questions: “Which are the most popular…

At the beginning of every calendar year, I write something new for the education community. In 2017, I wrote Splat!  (It took me until nearly the middle of February to finish it that year!) In 2018, I wrote Cube Conversations (I actually managed to finish that series a few days early, just before January.) In…

51 Brand New Esti-Mysteries!  4 Challenge Levels!  All New Images! If you’ve used the Esti-Mysteries from the original Esti-Mysteries blog post, or the 15 additional Esti-Mysteries that I wrote for 20 Days of Number Sense and Rich Math Talk, you’ll really enjoy this new set!   My goal was to write and post 51 brand new…

Introducing Esti-Mysteries!  Each image invites students to wonder what number is represented by the image.  As you click through the each Esti-Mystery, clues will appear that will allow the students to use math concepts to narrow the set of possibilities to a small set of numbers.  In the end, the students will need to call…

With a click, a pattern of dots appears on your screen.  Instantly your students tell how many.  They don’t count the dots.  Instead they simply know the total at a glance. Subitizing – when a person looks at a small set of objects and instantly detects the total without counting.  It’s a powerful process and…

For my educator friends who have access to Google Slides, but do not have access to PowerPoint, this post is for you.  Since Google Slides does not have the animation that makes the Splats become transparent, the Splat! reveal does not work in Slides.  Now – with these materials – it will.  I’ve rewritten the…

The Estimation Clipboard is a set of 40 lessons that each include 4 highly similar images.  Each image provides an invitation to estimate.  Then as new images are introduced, the students’ context and intrigue will grow – and so will their excitement. Jennifer Barker recently wrote about her experience with The Estimation Clipboard in her…

Several weeks ago, I posted Cube Conversations, which is a set of 80 animated lessons designed to promote visually rich math discourse.  You can learn more about – and download – all 80 of the Cube Conversations lessons here. Today, I’m adding a new – and very important – element to the series, which is…

Cube Conversations is a set of 80 (eighty!) animated lessons designed to promote visually rich math discourse.  I’ve designed these lessons to invite many voices and vantage points into classroom conversations. Much like Splat!, you control the animation with a few simple clicks  – and each click presents an opportunity for students to…