This document discusses communication and speech-language impairments. It notes that communication occurs through various means, including seeing, hearing, speaking, reading, writing and gesturing. Language uses abstract symbols to communicate within a group. Speech involves producing oral language and can be enhanced by gestures and written symbols. When people cannot interact normally, their basic needs may go unmet and they can become isolated. It is important for students to develop communication skills to interact with their environments. Augmentative and alternative communication uses tools like speech, gestures and devices to supplement, enhance or replace conventional communication methods. The document then lists and provides examples of various communication apps that can be used, such as Go Talk Now, Proloquo2go, and