If your class list lives in a spreadsheet, upload it as a CSV rather than typing the addresses out.
1. Open your classroom from the sidebar and go to the Students tab.
2. Click Add students.
3. Choose Enter email addresses, then click Next. The CSV upload is on the same step.
4. Click Upload a CSV file and choose your file. The CSV needs a column named email. There is an example CSV linked in the dialog if you want to check the format.
5. Send the invitations. Invited students show under the Invited tab until they accept.
Getting the file right
The column must be named email. Other columns are ignored.
One address per row.
Export from your MIS or spreadsheet as CSV, not as .xlsx.