We believe that education should be available to everyone, which means supporting the creation of free, open, and accessible educational resources. We are actively committed to increasing the accessibility and usability of the textbooks and resources we produce.

Accessibility features of the web version of this resource

The web version of this resource has been designed with accessibility in mind and incorporates the following features:

• it has been optimised for people who use screen reading technology
  • all content can be navigated using a keyboard
  • links, headings, and tables are formatted to work with screen readers
  • images have alt tags
• Information is not conveyed by colour alone.

Other file formats available

In addition to the web version, this book is available in a number of file formats, including PDF, EPUB (for ereaders), and various editable files.  Look for the ‘Download this book’ drop-down menu on the landing page to select the file type you want.

Accessibility improvements

While we strive to ensure that this resource is as accessible and usable as possible, we might not always get it right. We are always looking for ways to make our resources more accessible. If you have problems accessing this resource, please contact us to let us know so we can fix the issue.