Providing student feedback is an essential part of any classroom. Here are several options for teachers to give students in-progress comments or other feedback.
Written comments often to do not give student a deep enough understanding of what you are trying to convey. Sometimes, you just want to explain it. Here are two methods that give you that chance.
Kaizena - This is a tool that allows you to record audio throughout a document. Teachers set up an account and then have students submit their Docs to a teacher box.
Turnitin.com - While this is most commonly known as a plagiarism tool, it also has some amazing features for grading and providing feedback. The district has purchased Turnitin.com accounts for all teachers, so check with your principal to see who is your point-of-contact at your site.