Privacy

This site is a set of static pages. It has no accounts, no comment system and no forms of its own, and it sets no cookies of its own.

Embedded videos

Lesson pages embed videos from YouTube using its privacy-enhanced player, which does not store viewing data until you press play. Once you play a video, YouTube's own privacy policy applies.

Newsletter

If you subscribe to the newsletter, your address is held by the newsletter provider named on the sign-up page and used only to send you new lessons. You can unsubscribe from any message.

Analytics

We may use privacy-respecting, cookie-free page-view counts to see which lessons are read. If that changes, this page will say so.

Fonts

Typefaces are loaded from Google Fonts, which receives your browser's request for the font files.

Last reviewed September 2026.