ChromeVox speaks the content of the page, plays audio indicators for page load progress and objects on the page, and provides a way to navigate all web content from the keyboard. It is an extension for Chrome on Windows and Mac OS X which operates as an alternative screen reader for Web content.
You can use this free screen reader, which is available on Chromebooks and as an extension to the Chrome web browser, to provide better access to content for students who are blind or who have low vision.