Use Conversations inside Microsoft Classroom for private student-teacher conversations, and for collaboration and questions among the whole class.
Chat about an assignment
Sign in to Microsoft Classroom on the web, or open the mobile app for iOS or Android.
Select the assignment you want to chat about. On the website, messages are available on the assignment page. In the mobile app, select the Message icon in the assignment view.
Choose Class to see messages the whole class can see. To write a message the whole class can see, select Post a comment, and then write your comment.
Choose Teacher to see messages between just you and your teacher. To chat privately with your teacher, select Write a private message, and then write your comment.
If you use the mobile app for iOS or Android, you can get notifications when new messages are posted in one of your classes.