Three iBooks have been designed to help both families and professionals get started with Augmentative and Alternative Communication (AAC). They were developed out of the DfE Prospectus Project with ACE Centre, Communication Matters and 1Voice.
Getting Started with AAC: Designing and using alphabet charts
Getting Started with AAC: Using low-tech symbol-based systems with children
Getting Started with AAC: Access to low-tech symbol-based resources when pointing is difficult