Here are a few links from which you can purchase merchandise to work with your student with communication disorders!
Pyramidal Educational Consultants is a company designed primarily to address the needs of students are non-verbal (do not speak), have limited language or have highly unintelligible speech (are very difficult to understand when they speak). Communication books and other materials can be found on this page.
Super Duper Publications is a company that sells resources pertaining to nearly every school-based communication impairment! Games, books, tongue depressors and numerous other resources can be found on this page.
Pocket SLP is a website that include some great speech therapy apps for articulation, language and listening!