Have you visited Ability World's dedicated portable display boards website?
TalkSense Training: www.talksense.weebly.com
The excellent TalkSense website is hosted by Tony Jones, one of the leading experts on Augmentative & Alternative Communication, Multi-Sensory Referencing and Objects of Reference, Switch Skills Development and more. It also contains many free resources and tips on good practice in the use of Assistive Technology.
Charities and other organisations involved in AAC (augmentative & alternative communication)
Communication Matters: www.communicationmatters.org.uk
UK national charity concerned with the augmentative and alternative communication (AAC) needs of people with complex communication difficulties. Also known as ISAAC (UK) - the UK Chapter of the International Society for Augmentative and Alternative Communication