Students need to add you as a teacher to have access to upgraded features. You can either import them from Google Classroom, Clever or they can add you manually with the teacher code. Go to the 'Students' page to get started.

Here is more info on how to get your students onboard.

Start by going to the students page.

Students may need to reload the page for the change to take place. It's also a good idea to check they have signed up with the correct email address.