1 Overview of the course

Acknowledgements

This session of the course was written by Rosie Storrar on behalf of the Free Learning team at The Open University.

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence.

Course image (on home page): by Bryan Mathers http://bryanmathers.com/ CC BY ND

Every effort has been made to contact copyright owners. If any have been inadvertently overlooked, the publishers will be pleased to make the necessary arrangements at the first opportunity.