According to Wikipedia, Google Classroom is a free web service developed by Google for schools that aim to simplify creating, distributing and grading assignments in a paperless way. You child uses Google Classroom almost every day in my class. You can check your child's planner for login information. ***You can see the tests/quizzes/worksheets that we work on daily as well as the final grades for those items.
***Your child will have the classroom code for each class that uses Google Classroom.