Under the exceptions in the Copyright, Designs and Patents Act 1988, with a sufficient acknowledgement you may make a single copy from material published in the UK for the purposes of private study or non-commercial research, or for criticism or review.   

However, if you wish to make copies for teaching purposes - and this applies to printed materials, PowerPoint presentations and the distribution of digital copies through a virtual learning environment such as SurreyLearn - you must make sure you have the necessary permission.

Copying for the purposes of examination - setting, communicating and answering questions - is another exception in the 1988 Act and may be done without seeking permission, but again if you want to publish exam papers on the Web you need to exclude copyright material or ensure you have permission for its inclusion.