Homework Assignment on Google Docs

This evening I experienced sharing a Google Doc with my students. My students were assigned different problems on a worksheet to solve in groups. I asked them to make a Google Doc and post the answers to the questions so that all the students would have the answers to share. I was emailed the link, checked it and one was incorrect. I emailed the initiator of the document and a few of the students logged on to fix the problem. I was viewing the document at the same time. I chatted with them and viewed the chats with each to correct the answer. I was able to give them immediate feedback from home in the chat session when they corrected the answer.