Go to https://drive.google.com
If you have been added to any classes in Google Classroom, you will see a folder titled "Classroom"
Click on the "Classroom" folder
If you have been added to multiple classes, you will see multiple folders titled the name of the classes
Click on the folder for the class that you are working on
You will see multiple assignments, depending on whether you have started them.
Click on the assignment that you are needing to work on
In this example, a Google Docs tab will open up that you will fill out with the appropriate information
If you have created this Google Doc from Google Classroom, you can click on "Turn in" near the top right to submit the schoolwork