FAQ
Frequently Asked Questions
The things people ask most often, answered here so you do not have to write.
This Website
No. There is no sign-up and no login for visitors. Every page, every book series, and the whole Math Letters library is open to anyone who arrives. The only login on this site is for GOS staff who edit the content.
No. We keep no accounts, set no cookies, and run no analytics. The only thing that reaches an outside server is a YouTube thumbnail, on pages that carry a video — the Math Letters library, and any news or event item with a video attached. Nothing is loaded from YouTube until you press play. This is described in our Privacy Policy.
A form stores what you type into it. We would rather not hold your details at all, so we ask you to write to us by email instead. Your message then lives in our inbox and nowhere else.
English.
Math Letters
A short video — about a minute, the length of a clip you would watch anywhere — about mathematics in nature, life, science, and more. Each one starts from something ordinary: why sunflowers make spirals, why snowflakes have six sides. We call them letters because that is how they arrive: one at a time, to anyone who wants one.
No. Math Letters are free for everyone, and always will be. There is nothing to buy, nothing to unlock, and no account to open.
Almost every day.
Follow whichever channel you already use — the Subscribe page lists them. We never ask for your email address, so there is no mailing list to join and nothing to unsubscribe from later.
Write to us and tell us how you would like to use it. We are glad when teachers ask.
Books
Mathematics books in seven series: Kids' Math, Senior Math, Elementary, Secondary, PSS Series, Materials, and Teacher's Guide. The Books & Publishing pages show what is available in each series so far.
No. This site does not sell. There is no shop, no cart, and no checkout — it exists to show what we publish and to carry Math Letters, not to take your money. If you want to obtain a book, write to us and we will tell you how.
The series are arranged by stage, from early learners through secondary. If you tell us the age and what they have studied, we can point you to the right one.
Reaching Us
By email, at the address in the footer of every page. That single address reaches us for questions, support, partnership proposals, and job applications alike.
Santa Clara, California. The postal address is in the footer.
Then it is worth an email. Say which book or which Math Letter you mean, and we will answer.
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