Google Classroom: Understanding the Work Flow

Google Classroom has distinct levels of document control and sharing. You can can create an assignment, use it in multiple classes, and choose how students complete the assignment (for example, whether each student receives an individual copy or all students work in the same copy of the assignment). You can track who has completed the assignment and who hasn’t, and provide feedback to individual students. Once a student completes an assignment – and turns that assignment in to the teacher – ownership of the document changes hands. 

READ THIS tutorial to better understand the document sharing process in Classroom.