How to transfer students' grades to Classroom with the free plan

If you have a premium subscription, the worksheet scores are automatically synchronized from TopWorksheets to Google Classroom. However, in the free version this process must be done manually. 

To do this, go to Submissions section of the group you want to transfer the grades and from each submission take note of the student's name and grade.

Subsequently, in the Marks section of Google Classroom we will be able to transcribe the grades for each student.