From the organization administrative panel, select Add Teachers or Students, then in the dialogue box, select Upload Students.
There are two options on this page, a text box and upload via CSV option. The CSV option is on the right.
Either download the template on the page, or create your own CSV file with the appropriate emails, usernames, and passwords for your students. Make sure to include a header row like in the example, and to include all three of these pieces of information for each user.
After uploading the CSV, ThingLink will create accounts for your students that reflect the included information. They can log in with that information and do not need to register. On the first day of class, they should use their teacher's group code to join their group.