Google Classroom releases updates.

• Google Classroom releases updates.  
• (I especially love #2)

1. Support for multiple teachers: Teachers can invite other teachers to join their classes.
2. Draft posts and assignments: Teachers can save their work on an announcement or assignment and post it later once it is ready to go.
3. Draft grades: Teachers can save grades for an assignment and return the graded assignments to their students later.
4. Email notifications: Teachers and students can receive email notifications when someone creates a private comment for them.

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