Designing for Accessibility with POUR: Robust

This webpage, made available by Accessible Educational Materials (AEM) at Cast, Inc., describes one of the four qualities of an accessible user experience that are captured by the acronym POUR (Perceivable, Operable, Understandable, and Robust). The principles in Designing for Accessibility with POUR come from the Web Content Accessibility Guidelines 2.1. 

Website content that is Robust is "created in such a way that it supports not just current platforms and assistive technologies but future ones as well." This webpage includes tips and resources for creating educational materials that are Robust including the following techniques: providing descriptive metadata, performing an accessibility check, and testing content on a variety of platforms.