All teachers will find Google Classrooms already set up for them that sync with Infinite Campus. If you have any "old" Google Classrooms still showing that you don't use, please consider archiving those.
How to Accept Google Classroom Classes pushed out from Lil Sis?
How to create an Announcement on Google Classroom?
Emailing Students from Google Classroom.
How to Create Google Assignment?
How to Create a Rubric to a Google Assignment?
How to Grade Using a Rubric with Google Assignment?