Update March 22, 2019 | AIM Explorer is a free computer-based simulation that helps readers with low-vision, physical challenges, and learning and attention difficulties decide which reading access features found in the most commonly available text readers and reading software will help them access and understand text. Magnification, custom text and background colors, text-to-speech (synthetic and human), text highlighting, and layout options are presented in a logical sequence to help struggling readers decide which of these supports might help them to access and understand text.
http://aem.cast.org/navigating/aim-explorer.html#.XJVcZJhKiUk
Editor’s Note: The acronym AIM has morphed over time into the acronym AEM, assessible educational materials. AEM is now the acronym you’ll hear and see most often.