To hide any students in the dashboard, click on the Summary view of the teacher dashboard.
Click on the three dots next to the student's name to show a modal.If the student has signed in to their Desmos account, the email address associated with that account will also appear. To hide this student, click the Hide Student button within the modal. If students don't have an email linked to their account, it means that they have not yet signed in and won't be able to access their work after they leave the activity.
Click the "x" on the modal to go back to the teacher dashboard. All hidden students will no longer be shown in the student list on the teacher dashboard and their answers will be removed from view.