FREQUENTLY ASKED QUESTIONS
Estimation 180 has free math lessons and estimation tasks for grades 3-8 that help students develop their number sense one day at a time. You can use them as warm-ups, cool-downs, or even to launch a specific math concept. Students use clues, prior knowledge, or other critical information to make their estimates. They love seeing the reveals (a.k.a. “answers”), especially the video reveals.
Secondary math teacher, Andrew Stadel, started creating tasks for his middle school math students in 2012 and made it a goal to have an estimation task for each of the 180 days of school. The tasks are bundled in series of topics such as distance, time, spatial quantity, money, and more. Check out the Teacher Resources page to see how to get started.
Believe it or not, Estimation 180 tasks have not yet been tagged with specific math standards which allows teachers the flexibility to use them as they please.
GOOD NEWS!!! If you’d like estimation tasks specifically aligned to your grade level math standards, then check out the Estimation 180 Toolkits. The Toolkits are like a supercharged Estimation 180 experience because they contain teacher notes, video introductions, video reveals, classroom and student artifacts, downloadable handouts, games and more. You can learn more or get exclusive access to your grade level’s toolkit at estimation180.com/toolkit
Andrew Stadel has been teaching math since the early 2000s in California. He is passionate about creating tasks that invite all students into the math conversation through visual and conceptual ways, a core principle at Estimation 180. He has been an instructional coach, presenter, and consultant along the way supporting math teachers and their students. He is currently teaching secondary mathematics at a project-based learning school using standards-based grading and loving it.
There is no sponsorship or endorsements from any outside sources. Andrew Stadel has paid out of his own pocket to run Estimation since 2012.
However, in 2025, Andrew Stadel started building the Estimation 180 Toolkits so teachers have exclusive access to grade specific tasks and lessons, video introductions, video reveals, downloadable handouts, games, and more. The Toolkits are a supercharged Estimation 180 experience you and your students will love. Please consider purchasing one to help offset the yearly costs of keeping Estimation 180 running. You won’t find anything like it anywhere else.
Learn more at estimation180.com/toolkit
Many teachers wanted Estimation 180 tasks:
- Connected directly to their grade level math standards
- With “answers” their students couldn’t find on the internet
- With classroom examples and student artifacts
- With teacher notes
The Estimation 180 Toolkits accomplish all of this and MORE! Teachers can purchase a yearly subscription to Estimation 180 tasks directly aligned with grade level math standards that provide a conceptual, foundational, and hands-on experience for students to deeply learn mathematics in a fun and meaningful way. The Toolkits contain teacher notes, handouts, video introductions, video reveals, games, and more. Learn more at estimation180.com/toolkit
Subscribing to Andrew Stadel’s Newsletter gives you weekly emails with tips, strategies, and resources you might find helpful. Andrew takes your privacy very serious and will never sell or share your personal information with anyone else. Information like your name, grade level, and location help make sure you receive relevant newsletters and announcements that pertain to you. Thanks for your support. You can get a sample of tips and strategies by checking out Andrew Stadel’s blog.
Many reasons: I want to stay in touch by sharing my newsletter with you that contains tips, strategies, and resources. It helps me know how Estimation 180 is resonating with teachers in different grade levels and parts of the world. Lastly, I don’t want you to miss any exciting announcements that might benefit you and your students. I promise not to spam you. I’ll admit, I’m excited about the Estimation 180 Toolkits because I believe they’re AWESOME and I wish I had them when I first started teaching…so you might hear me talk a lot about them… similar to someone talking about their favorite restaurant, movie, band, book, etc.