Andrew Stadel shares student solutions to the first two problem solving tasks in part 1, his current rubric, and feedback codes. Next post will be the second month's tasks and student solutions.

Andrew Stadel shares how frequently he give students problem solving tasks and a great source for you to consider using. Future posts include student solutions, rubrics, and growth from month to month...

Free high impact MATH PD from your couch! Hosted by @makemathmoments #mmmsummit2025

Reimagine teaching integers in a visual manner and less abstract. Grade 6 integers can be fun and visual through Estimation 180 tasks and fluency games.

In this blog post, Andrew Stadel shares a few downsides to Estimation 180, positive of Achieve the Core and Illustrative mathematics and how the Estimation 180 Toolkit can bring life to ratios for Gra...

Andrew Stadel shares how he starts the school year. In Part 1, there are two classroom mantras, 5 activities, and an introduction to the Thinking Classroom. More in Part 2.

In this blog post, Andrew Stadel recaps everything he accomplished during the summer of 2025 and a few things to look forward to at Estimation 180 and andrewstadel.com.

In this blog post, Andrew Stadel provides his definition of Number Sense... inspired by math giants Steve Leinwand and Marilyn Burns, his classroom experience and 3 questions he often asks his student...

Thank you to Math Giants Brad Fulton, Marcy Cook, Steve Leinwand, Marilyn Burns, and Dan Meyer for your resources, inspiration, and work that has benefited so many teachers and students.

A former students taught me about the importance of starting the year with number sense exercises.

YouTube video by Andrew Stadel

Ideas to keep your new school supplies from disappearing!

Andrew shares a snapshot of his number sense skills at 5 years old. Hilarious. Developing number sense is a journey. Estimation 180 is a vehicle for developing number sense.

Andrew estimates tasks that he has not seen in years.

Where squares fall apart—and that's the point