Do you have multiple classes learning the same material? Google Classroom allows educators to post the same learning activity (assignment) to multiple classrooms at once. This feature is very handy for teachers who have multiple periods or sections, and want all of their students to be given the same assignment at the same time. This is a great time saver and is very simple to do. 

In the assignment creation pop-up, in the top-left corner of your screen, there is a pull-down menu that lists all the classes that you have created. By default, it displays the Class you are currently accessing. Click the downward-pointing button next to it and select the classes you want the assignment to post to. You are given the option of checking one Class or multiple. As soon as you post the assignment, it will appear on all of the Classrooms that you selected, at the same time.  No need to recreate the same assignment over and over for each Class. One check and it is all done for you.