Apple's newly released iOS 6 includes a new improvements to Speak Selection that highlights words as they are read aloud. Click here to learn how to update to iOS 6. The new feature is available on any iPhone, iPad or iPod Touch running iOS 6. To access the feature go to settings > general > accessibility > speak selection. Once enabled simply highlight any text and press speak to have the text read with text-to-speech. Speak Selection is great for people with dyslexia or for reviewing documents.