Find Your Students’ Usernames & Passwords

As long as you have students in a class/group that you own or coteach, you can view their usernames and change their passwords from the Members page in the class/group. 

The username is located right below the students' name. To change a students' password, click on the more icon  next to their name, then Change Password.

Here's some more detailed info, and a screenshot:

1. Go to the class/group page, then click Members in the left panel.
2. Locate the student in the list. The username is listed below the student's name.
3. To change a password, click the more icon  next to the students' name.
4. Click on Change Password.