Cookie policy

Version 1.1 · Effective 9 November 2026

Optional cookies stay off until you choose. You can change your choice any time with the “Cookie settings” link at the bottom of every page.

What cookies and local storage are

A cookie is a small text file that a website asks your browser to save. The next time your browser loads a page from that site, it sends the cookie back, so the site can recognize a returning browser. Local storage works in a similar way, but the data stays in your browser and is not sent with each page request. This site uses both, and this page lists every one of them.

Some storage is necessary for the site to do what you ask, such as remembering your cookie choice. Everything else is optional and needs your consent first. That is the rule in the EU ePrivacy rules and in Finland’s Act on Electronic Communications Services (917/2014), section 205.

What this site uses

The site uses three kinds of storage:

  • Necessary. Local storage keys on this site. tew-consent remembers your analytics cookie choice, its version and its date, so my banner does not appear on every page. tew-progress-v1 keeps your free School progress on your device. Neither is ever sent to me. These cannot be switched off, because the site cannot remember your choice without them. If you use an account, Firebase also stores sign-in data as listed in the table.
  • Analytics (optional). Google Analytics 4 sets the _ga cookie and a _ga_ cookie with the property’s ID, which help me count visits and see which guides are popular. They are set only after you accept analytics in my cookie banner. Google signals stay off in Analytics.
  • Marketing / advertising (optional). Google AdSense may set advertising cookies (for example on .doubleclick.net and related Google domains) so Google and its partners can serve ads, including ads based on prior visits to this site or other sites. Those cookies are used only after you agree in Google’s own consent message. You can change personalised-ad settings at adssettings.google.com and learn more at www.aboutads.info and Google’s partner sites page.

I do not use social media trackers or other marketing pixels. Fonts are hosted on this site.

Some links to Amazon are affiliate links. They are ordinary links, and this site sets no cookie for them. After you click, Amazon may set its own cookies on amazon.com under its own cookie notice. The affiliate disclosure explains more.

The table below is generated from the same list that the cookie banner uses, so the two always match.

The site uses Google Consent Mode v2. Before you choose, every Google consent signal (analytics_storage, ad_storage, ad_user_data, ad_personalization) is set to “denied”. The Google Analytics script is not downloaded until you accept analytics in my cookie banner. The AdSense loader is present so Google can show its certified consent message where required; advertising cookies stay off until that message (or your ads settings) grants them.

  • My banner asks only about analytics. “Accept all” / “Reject all” / “Save my choices” there apply to Analytics only.
  • Google’s consent message (Funding Choices / Privacy & messaging in AdSense) asks about advertising cookies for visitors who need that choice.

I do not record a rejection as an event. Your analytics choice is saved with a version number. If I add a new analytics cookie or change that banner, the version changes and my banner asks you again. It also asks again after 12 months.

How to change your choice

Use the “Cookie settings” link at the bottom of any page, or the button at the end of this page, to switch Analytics on or off. When you switch Analytics off, the site deletes the _ga and _ga_ cookies it can reach and tells Google Analytics to stop.

For advertising cookies and personalised ads, use Google’s consent message again when it is offered, or visit adssettings.google.com.

Browser controls

You can also manage cookies in your browser. Most browsers let you see and delete cookies and site data, block third-party cookies, or clear everything when you close the browser. Look for “Cookies and site data” or “Privacy” in your browser’s settings. If you clear site data for this site, your cookie choice and your School progress are deleted too, so the banner will appear again and the School will start fresh. You can export your progress first on the My learning page.

Changes to this policy

If I add or remove a cookie, a storage key or a service, I update the table and this page first, change the consent version and ask for your choice again. The version and effective date are shown at the top of this page.

More about how I handle personal data is in the privacy policy.

Cookie settings

Choose which cookies I may use. Necessary storage keeps this choice and your School progress on your device and cannot be switched off. Advertising cookies are controlled by Google's consent message when ads are shown.

Stores your cookie choice and your School progress in your browser. If you sign in, it also keeps you signed in and saves your progress and comments to your account (Google Firebase). Nothing else is sent to me.

Google Analytics 4 counts visits and popular pages. Google signals stay off. Set only if you say yes here.

Google AdSense may show ads and use advertising cookies. Consent for those is asked in Google's own consent message (Funding Choices), not in this dialog. You can also opt out of personalised Google ads on adssettings.google.com whenever you like.