Motor/Mobility: Voice recognition software, touch screens, head/mouth wands, special switches, keyboard overlays, one-handed keyboards, oversized mouse or trackball are some of the tools a user with limited mobility may use, but for testers, all you’ll need is a traditional keyboard to test. Ensure that there is a logical tab order (left to right, top to bottom) and provide logical and standard keyboard commands. Tab through the site and visually see if the tabbing order is logical (usually known as OnFocus). If an element is skipped or the tabbing order doesn’t make sense to you as a tester, that could possibly be an issue of ADA compliance.
You may have installed a ramp, increased the width of your door frames, or made other accommodations to ensure that your physical premises are accessible to all. The requirement for equal access used to only apply to physical locations and storefronts, but now the government is actively ensuring that the requirements for ADA accessibility include online properties such as websites and mobile apps.
The Department of Justice’s revised regulations for Titles II and III of the Americans with Disabilities Act of 1990 (ADA) were published in the Federal Register on September 15, 2010. These regulations adopted revised, enforceable accessibility standards called the 2010 ADA Standards for Accessible Design, "2010 Standards." On March 15, 2012, compliance with the 2010 Standards was required for new construction and alterations under Titles II and III. March 15, 2012, is also the compliance date for using the 2010 Standards for program accessibility and barrier removal.

^ Esshaki, Tiffany (July 21, 2015). "Remembering the 'Capitol Crawl'". C&G News. Retrieved January 15, 2016. The event, known as the "Capitol Crawl", was an image that legislators couldn't ignore, Bauer said. She had fought since the 1960s to legally protect the rights of people with disabilities, and with that heroic display, she said, lawmakers simply couldn't go back to their constituents without action.