If your teacher imported you through Google Classroom, you should log in by clicking the "Log in with Google" button on the CommonLit login page.
The first time you log in, you may first see the "Your Account Needs Updating" page and will be prompted to select your grade level.
If you are not prompted to select your grade level (or after you have selected your grade level), you will see the "Your Teacher Wants You to Connect to Google Classroom" page. You must click the "Connect To My Google Classroom Account" button in order to take an assignment linked to Google Classroom. If you miss this page, don't worry - you can connect to Google Classroom from your My Account and Classes page as well. We will also prompt you to connect when you go to begin an assignment if you haven't successfully connected yet.
That's it - you're all set!