Voice Typing Is A Great Feature in Google Docs- Here Is How to Use It | TIC & Educación | Scoop.it
From www.educatorstechnology.com - December 16, 2015 1:41 AM
There are several speech to text extensions that allow you to type with your voice in a Google document  (e.g Speech Recognition, Voice Recognition). However, Google Docs itself has a powerful integrated functionality called Voice Typing which is overlooked by many users. For now, Voice typing in Google Docs is only available on computers and only in Chrome browsers.