Teachers are asked to trust a lot of revision material that nobody has put their name to. This page is here so you can decide how much to trust ours.
Who writes it
Every teacher page names the person who wrote it. Where someone else has checked it, that person is named too. If a page carries a name, that person is answerable for what it says.
We'd rather leave a topic uncovered than publish something under a name that doesn't mean anything, so you'll sometimes find a gap here.
What "reviewed" means
A review date tells you when a person last read the whole page against the current specification and the current state of the site. It isn't the date the file was last edited.
We re-review a page when any of these happen:
- The exam board publishes a revised specification.
- The revision content the page points at changes.
- A reader reports something that turns out to be wrong.
How specification alignment is checked
Revision content is mapped to a specification before any of it is written. We do that mapping against the exam board's own published specification document, and it records the topic structure and the assessment detail for that board and that subject.
Modules are then built against that map, so each one is tied to real specification points. You can see the result on the revision pages, where each specification lists its topics and the modules that cover them, next to the official past papers for the same qualification.
Every question is marked on the server against a stored answer key. We also check the whole library automatically for questions a student could answer by guessing, or by spotting a pattern in the options. Anything that fails those checks is rewritten before it goes live.
What we won't do
We don't publish invented quotes, invented schools, or claims about results that we can't show the working for. Our policy on evidence and citation is set out separately, on the evidence page.
Telling us something is wrong
Corrections are welcome, and we'd much rather have them than not. Tell us which page, what's wrong and what it should say. We'll fix the page and move its review date.