Augmentative and Alternative Communication (AAC) covers any method beyond speech used to communicate. The range is wide — from low-tech picture cards and PECS binders to high-tech tablet apps to dedicated Speech Generating Devices.
Low-tech AAC includes picture cards, PECS binders, communication boards, and visual schedules. No power required. Durable, inexpensive, and highly portable. Often a starting point for young children before high-tech systems.
High-tech AAC includes iPad apps like Proloquo2Go (~$250), TouchChat, LAMP Words for Life, and Snap Core First. Text-to-speech output. Robust vocabulary systems. Not ADP-eligible as a tablet, but can be school-board funded or purchased privately.
Dedicated Speech Generating Devices (SGDs) are built specifically for communication — Dynavox, Tobii Dynavox, PRC-Saltillo. Rugged, purpose-built, often with eye-tracking options. ADP-eligible. Cost typically $3,000–$10,000+ before ADP subsidy.