The following steps will add a "reader" tool to Google Chrome. This tool will read documents (Google docs and PDFs) aloud and give visual tracking assistance if the user if reading along. Once this tool is installed to a user's Chrome, this tool will be available every time that user logs into Chrome on any computer.
From within Chrome.
If you have many extensions already installed, you will need to scroll to the very bottom to find this next link.
In the left search field, search for read&write.
This search will return these two extensions: 1) Read&Write and 2) Screenshot Reader.
The extension will add this little purple puzzle piece in the top right. Click on that. It should prompt you to log into Chrome (using your usual Google log in info) and then you'll have to click to allow read&write to access your Chrome info then another click that you "Got it" about something.
At this point, you can open your Google docs that you would like read to you. If you happen to already have that document open, click to reload that document and this little puzzle piece will appear above your toolbar.
Clicking on that new purple piece will lower the read&write control bar which has the arrow play button on it. You will notice a bunch of other fancy tools on this control bar. Looks like all of the fancy highlighting features will expire in 30 days, but the reading feature will stay and is free.
Reading a PDF
The process is a little different if you want the extension to read a PDF. To read a PDF from Google Drive, double-click the PDF so that it opens in the Drive Viewer. With the PDF in view, click the "Open with" dropdown at the top.
In the dropdown, you should see the choice to open with read&write. Select that option.
The read&write toolbar will open, with the play and stop buttons in the middle.
If you click play without highlighting any text first, you will receive this error. When "reading" a PDF, you must first select the text that you want read; selecting a paragraph at a time works well.
Highlight the text you want to "read" and click play. The reader will highlight one sentence at a time with the current word being read tracking one word at a time.