Adobe's PDF files are common way to share information with students in a format that doesn't change depending on the browser. Not all PDFs are accessible since there are three types of PDF documents—unstructured, structured, and tagged—only tagged PDF files are optimized for accessibility. Few authors are currently creating tagged PDF files, either because this requires additional effort or because of lack of awareness. Authors are also limited by the capabilities of their word processing or desktop publishing tools, many of which have PDF export capabilities that do not currently support tagged PDF format
CAUTION : Although the information listed below suggests how to make your materials accessible, before making any PDF document available to the public, it should always be tested thoroughly for accessibility using the Adobe Acrobat Professional OR actually testing the document with a screen reader like JAWS. Not only will the Acrobat Professional accessibility application test the page, it will provide detailed instructions on how to remedy any errors that are reported.
These guides describes how to use Acrobat’s PDFMaker with Microsoft Word to make accessible PDF files. Some of the techniques apply to the Microsoft Office productivity suite as well, such as the PowerPoint presentation graphics program.
If your versions of Office 2003 does not have the correct add-on, go to Microsoft's free Save as PDF or XPS Add-in for 2007 Microsoft Office programs download page and follow the instructions provided. Office 2010 includes the PDF/XPS option by default.