Privacy
This site sets no cookies and runs no analytics. There’s nothing here watching what you read.
Hosting
The site is hosted on Cloudflare. Like any web host, Cloudflare processes standard request data, such as your IP address and browser details, to deliver pages and protect the site from abuse. I don’t use that data to track or profile anyone.
Your theme setting
If you pick Light or Dark in the header, your browser remembers that choice in its own local storage so the next page matches. It stays on your device and is never sent to me. Choosing System clears it.
If you email me
I’ll have your address and whatever you wrote. I use them to reply, and I don’t share them or add you to any list. My email is hosted by Runbox.
Videos
A few pages include one of my YouTube videos. Until you press play, you see a still image stored on this site, and nothing is loaded from YouTube. When you press play, YouTube’s player loads from youtube-nocookie.com. From then on, YouTube (Google) receives the same request data any site does, such as your IP address, and may store data in your browser while the video plays. Google’s privacy policy applies to that. If you’d rather not, the link under each video opens it on YouTube itself.
Interactive math
Some lessons include an interactive diagram I built in GeoGebra. Until you choose to load it, you see a still image stored on this site, and nothing is loaded from GeoGebra. When you load it, your browser fetches GeoGebra’s app from geogebra.org, which receives the same request data any site does, such as your IP address. GeoGebra’s privacy policy applies to that. The link under each one opens it on GeoGebra instead.
Links elsewhere
Some links go to other sites, like YouTube and Substack. Once you’re there, their privacy policies apply, not this one.
If this changes
If I ever add something that collects more, I’ll update this page first. Questions go to hello@kwpledger.com.
Last updated 3 October 2026.