Implementing Google Classroom into my high school ELA classroom has been one of the best things I've done. Not only can my students complete and turn in assignments online, but they can also access their assignments at home if they must be absent. Yes, it's extra work for me to front-load all their work into the Google system, but it's worth it when a student asks me in the middle of class for their missing work, and I can direct them to Classroom.
Even better, students can also resubmit revised work or late work. That said, there's a trick to submitting that work without it getting lost in the Interwebs, since Classroom doesn't send a notification when students turn work in.
Click the image link below for the solution.
Google Classroom: Submitting Late Work
When students submit work in Google Classroom a notification is not created. This can be an issue when work is submitted late or when students make updates to their work that need to be commented on.