Privacy policy

The short version: Math Ladder is for adults who print practice sheets for their students. We collect as little as we can, we never sell or share it for advertising, we use no analytics or trackers, and you can download or delete your data at any time from your Account page.

Who we are

Math Ladder (mathladder.net) is run by John Clos, a sole proprietor in the United States ("we", "us"). Questions about privacy go to support@mathladder.net.

Who the service is for

Accounts are only for adults 18 or older: parents, guardians, tutors and teachers. Students do not have accounts, do not sign in, and do not give us any information themselves. We do not knowingly collect personal information directly from anyone under 13. If you believe a student has created an account, email us and we will delete it.

What we collect and why

About you

• Email address, to sign you in, send sign-in links, receipts and service messages (for example, that a pass is about to end).
• Name (optional), printed on your receipts.
• Password, stored only as a one-way hash. If you sign in with Google, we receive your Google account ID and email address, and nothing else.
• Sign-in sessions: the time, IP address and browser type of each signed-in device, so you stay signed in and so we can spot misuse.
• Orders: what you bought, for which student, the amounts, and the billing address you give at checkout (used for sales tax and receipts). Card details go straight to Stripe; we never see or store your card number.

About your students

You decide what to enter. A parent or guardian entering this information consents to us using it as described here.

• Name on sheets: a first name or nickname printed on the student's sheets.
• Grade (optional), used only to suggest a starting stage.
• Full name for receipts (optional), printed only on receipts, for example for an ESA program.
• Progress: the sheets you make, the checkpoint scores and times you enter, and which stages the student has access to.

We do not ask for, and you should not enter, a student's birthday, school, address, photo or any other details.

Free sheets without an account

When you make a free Stage 3 sheet without an account, we store the sheet with your IP address so we can apply the free-use limits. These sheets and their IP addresses are deleted after 14 days.

Errors and security logs

If something breaks, we record the error, the page it happened on and technical details from the browser or server. We also keep a log of sign-ins, failed sign-ins and administrative actions to protect accounts.

What we do not do

• No advertising, and no selling or "sharing" of personal information as defined by US state privacy laws.
• No analytics, tracking pixels, fingerprinting or third-party trackers.
• No profiles of students beyond the progress you enter, and no use of student information for anything except running Math Ladder for you.

Cookies and storage

We use only the cookies needed to run the service: one that keeps you signed in, and a short-lived one during Google sign-in. Your browser also stores your theme, your shopping cart and your list of free sheets on your device. None of these are used for tracking.

Who we share it with

Only the service providers that run Math Ladder for us, and only what each needs:

• Stripe processes payments and receives your payment and billing details, your email address, and the items in your order.
• Our email delivery provider sends sign-in links, receipts and service messages, and receives your email address and the message.
• Our hosting provider runs the server in the United States where the data is stored.
• Google, only if you choose to sign in with Google.

We may also disclose information if the law requires it, or to protect the rights and safety of our users or the service.

How long we keep it

• Your account and students: until you delete them.
• Orders: kept as long as tax law requires, even after an account is deleted, with your email address and student names removed.
• Free sheets made without an account: 14 days.
• Expired sign-in sessions and email links: deleted automatically.
• Backups: kept for up to 14 days, so deleted information can remain in a backup for up to 14 days before it is gone.

Your choices and rights

• See and download everything we hold about your account and students: Account page, "Download my data".
• Correct it: edit your details and your students at any time.
• Delete a student or your whole account: deletion takes effect immediately.
• Email support@mathladder.net for anything else. We will answer requests from any user, whatever state you live in.

Security

The site uses HTTPS everywhere. Passwords are hashed with Argon2, sign-in links expire quickly and work once, and administrative access requires two-step sign-in. No system is perfectly secure; if we learn of a breach that affects you, we will tell you promptly.

Changes

If we change this policy in a way that matters, we will email account holders before the change takes effect. The date at the top shows the latest version.