Anonymous usage statistics

What Chemistry Help counts

When aggregate statistics are enabled, Chemistry Help counts page views and broad interactions such as starting a game, opening a hint, checking an answer or completing a tool. For generated practice it can also count the question family or skill being used and a broad outcome such as correct first time, retry, clue or worked answer. It may also count a broad device-size category, how far a page was scrolled, a broad visible-time band, whether a visit arrived directly or from search, and which Chemistry Help page was viewed next.

What Chemistry Help does not store

• No analytics cookie or visitor identifier is sent to the server. To count a browser only once per day, this browser keeps only the date it was first counted and the last date it was counted.
• No name, email address, typed chemistry answer or free-text content.
• No IP address, full user-agent string, full referring URL or individual session replay.
• No cross-site tracking, advertising profile or data sale.

Events are added to daily totals as they happen. The two dates used for daily browser counting stay in this browser; the server receives only an aggregate event saying that a new or returning browser was counted that day. Page-to-page movement is stored only as aggregate counts such as “homepage to AQA Year 12”; there is no visitor identifier linking a sequence to a person or browser. The dashboard contains group totals and no individual browsing history.

Reporting an issue

Interactive tools include a small “Report an issue” control. Clicking it immediately sends enough context to investigate the current activity, such as the tool, current question or generated state, site version, page and basic browser/display information. If an answer or worked solution is visible, that may be included so the problem can be reproduced. You can optionally add a category or note afterwards.

These reports are separate from the anonymous aggregate statistics above. If you are signed in to My Chemistry, a report may be associated with that account; otherwise it is treated as a guest report. Reports are used only to check and improve the learning content and site operation.

Saved My Chemistry results

If you are already signed in to My Chemistry, some games can save a completed result. The result is sent directly to members.chemistryhelp.co.uk and may include the activity mode, score, time, items missed and broad question-family or skill labels needed for progress and review. Checking your sign-in state may create or use a random Members session cookie, which is sent only to the Members subdomain. Chemistry Help does not receive your members sign-in details.

If you are not signed in, a result or personal best may be kept in this browser so that you can choose to save it later. Clearing this site's browser storage removes it.

Your choice

You can turn off anonymous usage events for this browser at any time. This also clears the two browser-counting dates described above. Chemistry Help remembers the off choice only on this device.

Contact

Use the feedback form if you have a question or objection.