If you use Clever, you don't need to create classes manually! You can simply sync your classes and students with Clever. After you do so, your imported students will be able to use their Clever login info to log in to Formative as well.
1. On the "Classes" page, click on "Clever Roster Sync:"
2. Log into your Clever account:
Your class(es) will appear including all the students currently enrolled in them. When you login with Clever your classes will automatically re-sync any new students - saving you the guess work!