If you use a PC, click this link to run a screen-reading test for Windows using NVDA
VoiceOver is a screen-reading program that is built into the Mac Accessibility suite of tools. There are many keyboard shortcuts users can employ to navigate around the page. It uses synthesized speech to voice content, including headings, alternate text, and other formatting features.
When you start VoiceOver, a quick and simple tutorial automatically launches. It will walk you through the basic how-to's. For further information about commands and navigation tips, check out http://webaim.org/articles/voiceover/#shortcuts
Complete tutorial coming soon...