For your child to log into Google classroom from home they will need their emoji password provided by their teacher and an electronic device that can browse the internet.
Students need to sign into Wonde using their emoji password. This will let them log into the displayed application without needing an additional username and password ( in most cases)
Wonde : https://edu.wonde.com/login/exwick/emoji
From here they can click on the icon for the application they want (for google classrooms please click on the Classroom icon).
It will then open a tab logging them into the website so they can use it.