A: The best answer to the first part of this question comes from the Google for Education team - "Classroom is a new tool that weaves together Google Docs, Drive and Gmail to help teachers create and organize assignments quickly, provide feedback efficiently, and communicate with their classes with ease. It lets students organize their work, complete and turn it in, and communicate directly with their teachers and peers.
Classroom helps teachers create and collect assignments paperlessly. When teachers create assignments, they can choose to share a single document, or automatically make a copy for each student. They can quickly see who has or hasn't completed the work, and provide direct, real-time feedback.
Classroom automatically creates Drive folders for each assignment and for each student. Students can easily see what’s due on their Assignments page, so they can stay on top of their work.
Classroom also lets teachers make announcements and pose questions—improving communication inside and outside of class."