In order to use google classroom, your child will need to be signed up through their school-provided gmail account. Google classroom is where students will be able to view their homework assignments, quizzes and tests, and materials they will need for their classes. It is vital that your child is able to login to google classroom during distance learning.
Your child will also need to use google account to check their emails. Make sure you or your child is checking their emails regularly, as I frequently communicate with both students and parents through gmail.