Don't worry, you don't really have a dead pixel on your screen.
Each class has a Google Classroom that you'll need to be registered for. In order to be a part of the Google Classroom, click add a course, then type in the following code that corresponds with your class:
Dostoevsky 1: e30i0hi
Morrison 2: udqxxno
Steinbeck 4: t76fgnz
Miller 5: m9fe5i