Do you receive email notifications from Google Classroom regarding your student's assignments? If not, please contact each individual teacher to inquire how to get this set up. Most teachers send out invitations at the beginning of the year to parents and guardians of students. If your contact information has not been updated recently, be sure to call the office or email the school secretary to update your information.
In my classes, Google Classroom is used on a daily basis. I post the assignments on there as well as any important links/materials that the students need to complete their work. Google Classroom is a great platform for communicating with the students and keeping parents in the loop on their child's progress.