➗ Math apps and platforms · 🏫 Classroom tools
Estimation 180
By Andrew Stadel. Visit Estimation 180
Desk research from the maker's own pages. Not yet tried by us. Checked 2026-10-24.
A free collection of over 200 daily visual estimation tasks made by math teacher Andrew Stadel. Each day shows a photo or video (how many cubes fill the jar, how tall is the stack), students give a low guess, a high guess and a best estimate, then see the answer revealed. Teachers use them as five-minute warm-ups to build number sense in grades 3-8. Paid grade-level Toolkits add standards-aligned tasks and videos.
Our take: A simple, well-liked warm-up for teachers and homeschool parents of grades 3-8; it is a daily habit, not a full math program.
Checked in a browser
A browser check on 2026-10-25: what loads, the ads and trackers we saw, and what a child meets first. Not a hands-on test.
| Child safety: 4 out of 5 | No ads or chat; links out to YouTube, Vimeo, Facebook and Twitter. |
|---|---|
| Data: 5 out of 5 | No ad, tracking or analytics networks; only Google's static file host was contacted. |
| Ease: 3 out of 5 | The page is a teacher's site of blue text links and numbered steps; a child would need a teacher or parent to pick a day. |
| Cost honesty: 4 out of 5 | The 200+ daily tasks are free; a paid Toolkit, workshop and coaching are offered to teachers further down. |
What we found
- Contacted 1 third-party site (gstatic.com); 1 cookie set.
- No ads or trackers.
- Offers 200+ free daily estimation tasks for grades 3-8.
- An upsell for the 'Estimation 180 Toolkit', a full workshop and coaching is aimed at teachers.
From the test: Free, ad-free and tracker-free daily estimation tasks, set up for a teacher or parent to lead.
| Ages it suits | grades 3-8 (about 8-14) |
|---|---|
| What its terms say about age | Not stated. No student accounts; the tasks are shown by a teacher or parent. The privacy policy covers newsletter sign-ups. (terms) |
| Price | Free, with paid extras. 200+ tasks free; Grade 3 Toolkit $49 for one year, and a Grade 6 Toolkit is also sold (Oct 2026) |
| Works on | Web |
| Account | No account needed |
| Ads | None |
| In-app purchases | None |
| The AI in it | No AI |
What's good
- Free, quick daily routine
- Builds reasoning, not just right answers
- No ads or tracking seen
Watch for
- Needs an adult to run it
- Free tasks are not tied to standards
- Grade-aligned Toolkits cost extra
Data and privacy
Collects name, email and zip code only when you sign up for the newsletter or a download, stored on MailChimp; uses cookies and log files. Our page load showed no third-party trackers. Read the privacy policy.
Does it work?
No study found.
In the Big Index
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Where these facts come from
- https://estimation180.com/
- https://estimation180.com/faqs/
- https://estimation180.com/toolkit/
- https://estimation180.com/toolkit-grade3/
- https://estimation180.com/privacy-policy/
Prices, terms and features change. Nobody paid to be listed, nothing here is an affiliate link, and Peabody never rates itself. Where we and the maker disagree, the maker's own pages are the ones to trust.