Since your organization is using Clever (or another rostering system) to automatically synchronize its student rosters to Let's Go Learn, teachers are not able to edit classes that show up in their teacher accounts. But teachers can still create custom classes that can be used for grouping, pull out programs, implement interventions, etc.
Follow these instructions:
Step One: From your <Class> tab, click on "+ Add Class" button. Enter in a descriptive class name and click on the "Add Class" button.
Step Two: Click on the "Move Student" button and search for the student you would like to add to your class by Student ID # or last name.
Step Three: When you have located the student, highlight the student's name and click on the red "Move" button. Repeat step two and three until you have added all students.