If you haven't already, you can sign up by clicking here. You will be prompted to enter a class code. Your teacher provides you with a unique class code to sign up. If you don't have this code, please reach out to your teacher.
You can also join additional classes from your Classes page.
Click the join class button next to the class(es) you are already in.
Then enter the class code from your teacher(s).
Once you input your class code and click sign up. Once you've joined, your teacher will receive a notification that you have joined their class.