MOTE: Chrome Extension for leaving voice comments in Google Docs, Classroom, etc.
Mote is a free Chrome extension that allows you to send audio comments in Google Docs, Classroom, Slides, etc. You can just speak your comment after you hit the Mote button and the person will receive a voice message.
You can save often used comments in your Motebook, and use them again and again.
If BOTH teacher AND student have the Mote extension, Motes show up automatically and you don't have to visit a separate page.
Voice comments are much more personal and the person receiving them will have a better understanding of what you meant because they can hear your voice.