The Chrome Web Store has many useful applications for instructors of all fields and for businesses. If you haven't downloaded Google + already, then do it now.
Choose wisely because the applications cannot be deleted once installed. If you are not sure what to download, look at the ratings and try it before downloading. There are apps for YouTube, Hangouts, Languages, the Sciences and much more. I use many of them for my students.
Click above on the Online Student Journal Tab for information on how I use Google documents for online student journal writing.