Transitioning from ANGEL to Canvas has vastly improved the accessibility of our online courses because the platform is developed on open web standards that allow assistive tools like text readers. One of the reasons why ACIR recommended Canvas was because the National Federation of the Blind certified Canvas in 2010 (click to see announcement) .
In order for these accessibility features to work, faculty and instructional designers must ensure that content developed or uploaded into Canvas use these standards. This Canvas Guide article on Improving Accessibility in your Courses can help.
Special care must be taken in uploading content that was scanned from the original source. Essentially the challenge is that copiers typically scan documents to an image file. This means that when you open the file you are actually viewing a picture of the scanned document. Electronic readers cannot read image files. Copiers with Optical Character Recognition (OCR) capability are better because they can actually capture the text during the scanning process so these documents are readable after upload to Canvas.
Some PDF image files can be converted with Adobe Pro and other tools before uploading to Canvas. This video shows a demonstration of readers we have on Avila common shared computers and gives a couple of methods for converting PDF image files.
Disability Services has a copy of Adobe Pro and can help faculty with conversions of content. Instructional Design services in Carondelet can also help. Contact Sharon Depperschmidt or Mark Eaton for more information.