➗ Math apps and platforms · 🏫 Classroom tools
dy/dan (Dan Meyer)
Here for your child to play now? Arcade · Library
The answer in one minute
- What dy/dan is: A blog about teaching math by Dan Meyer, a former high school math teacher with a doctorate in math education from Stanford who is Chief…
- Ages, price, ads: Free · Ages written for teachers · Ads: none.
- Our take: Worth reading for math teachers interested in classroom craft; not a resource children use directly.
Peabody (ours): learning games by skill, math facts included. Free through the end of 2026, no sign-up, no ads.
Play freeBy Dan Meyer. Go to dy/dan (Dan Meyer) ↗
Desk research from the maker's own pages. Not yet tried by us. Checked 2026-11-10.
Quick answers
- How much does dy/dan cost?
- Free to read; content is under a Creative Commons Attribution 4.0 license (Nov 2026).
- What age is dy/dan for?
- Ages it suits: written for teachers. What its terms say: The site states no minimum age.
- Is dy/dan safe for kids?
- Our take: Worth reading for math teachers interested in classroom craft; not a resource children use directly. Ads: none. In-app purchases: none. Account: no account needed. Watch for: Latest posts shown are from 2021.
- Where is the official dy/dan site?
- The official site is blog.mrmeyer.com, from Dan Meyer. It works on the web.Go to dy/dan ↗
- What are the alternatives to dy/dan?
- Three others in math apps and platforms: 99math, Desmos and DreamBox Math.
A blog about teaching math by Dan Meyer, a former high school math teacher with a doctorate in math education from Stanford who is Chief Academic Officer at Desmos. Posts are essays on classroom practice, feedback and educational technology. It is for teachers, not children. Free to read; the author now writes mainly on Substack.
Our take
Desk researchWorth reading for math teachers interested in classroom craft; not a resource children use directly.
- PriceFree
- AdsNo ads
- In-app buyingNone
- AccountNone needed
Ages written for teachers · 4 good things · 4 things to watch for
Is dy/dan OK for my kid?
Find your child's age. Each row reads dy/dan's own terms (quoted above), the ages it suits and the account it needs. An age rule is the least a maker asks, not a judgement that it suits a child of that age. Check another app.
| Age | By its terms | Why |
|---|---|---|
| 4 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 5 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 6 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 7 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 8 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 9 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 10 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 11 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 12 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 13 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 14 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 15 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 16 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| 17 | No age rule | We found no age the terms set for using it.No age range it suits is given. |
| Ages it suits | written for teachers |
|---|---|
| What its terms say about age | The site states no minimum age. (terms) |
| Price | Free. Free to read; content is under a Creative Commons Attribution 4.0 license (Nov 2026). |
| Works on | Web |
| Account | No account needed |
| Ads | None |
| In-app purchases | None |
| The AI in it | No AI mentioned on the front pages we read. |
What's good
- Plain, detailed essays on math teaching
- Content reusable under Creative Commons
- Discloses his work with publishers and Desmos
- No ads seen
Watch for
- Latest posts shown are from 2021
- No privacy policy found
- Open comments and social share buttons
- Aimed at adults
8 things to know before your child uses dy/dan
- Check the age rule first. The site states no minimum age.
- Know what it costs. Free. Free to read; content is under a Creative Commons Attribution 4.0 license (Nov 2026).
- See whose account it is. No account needed. Nothing to sign up for.
- No ads or purchases. dy/dan shows no ads and sells nothing inside it, so there is nothing for a child to tap by mistake.
- Read what it does with data. We found no privacy policy on the blog. Posts have comment sections, and share buttons link to social networks. The disclosures page covers conflicts of interest, not data.
- Know where the AI is. No AI mentioned on the front pages we read.
- Watch for the main catch. Latest posts shown are from 2021.
- Start with what it does well. Plain, detailed essays on math teaching.
Data and privacy
We found no privacy policy on the blog. Posts have comment sections, and share buttons link to social networks. The disclosures page covers conflicts of interest, not data.
Does it work?
The maker's own claims only; we found no independent study.
dy/dan beside 4 alternatives
| App | Price | Ads | In-app buying | Account | Ages |
|---|---|---|---|---|---|
| dy/dan (this page) | Free | No ads | None | None needed | written for teachers |
| 99math | Free, with paid extras | No ads | Yes | The child's own | about 5-14 (grades K-8) |
| Desmos | Free | No ads | None | None needed | about 10-18 for the… |
| DreamBox Math | Paid | No ads | None | A parent's | about 5-14 (grades K-8) |
| enVision Mathematics | Through schools | No ads | None | A school's | grades K-12 |
Alternatives to dy/dan (Dan Meyer)
Desk researchFree, with paid extrasNo ads
99math
99math (Estonia) · ages about 5-14 (grades K-8)
A low-effort, free way for teachers to make fact practice lively; parents of kids who dislike timed competition may want a calmer tool.
Desk researchFreeNo adsNo account
Desmos (and Amplify Classroom)
Desmos Studio PBC; classroom lessons by Amplify Education · ages about 10-18 for the calculators; grades K-12 for Amplify Classroom lessons
Every middle and high schooler should know the calculator; younger kids get more from the teacher-led Amplify Classroom activities than from the tools on their own.
Desk researchPaidNo ads
DreamBox Math
Discovery Education (formerly DreamBox Learning) · ages about 5-14 (grades K-8)
A well-tested choice for K-5 math at school or home; families who want free practice or older-grade content may look elsewhere.
Desk researchThrough schoolsNo ads
enVision Mathematics (Savvas Realize)
Savvas Learning Company · ages grades K-12
Families get it through school; ask whether your district has the AI features on and how student data is handled.
Desk researchThrough schoolsNo ads
Eureka Math²
Great Minds PBC · ages PreK to Algebra I (about 4-15)
A well-regarded core math curriculum your district picks; ask for parent guides if the methods look new.
Desk researchThrough schoolsNo ads
Freckle
Renaissance Learning · ages about 5-18 (grades K-12; math through Algebra 2)
A reasonable school pick for differentiated practice, especially in districts already using Star tests; families can't buy it directly.
Where these facts come from
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.