All Tri-College (Bryn Mawr and Haverford) students enrolled in a Swarthmore course receive Swarthmore usernames and passwords that they use to log into Swarthmore's Moodle site. If a Tri-Co student is officially enrolled in your course, they will automatically be added to your Moodle course roster. To access your course, the Tri-Co student should log into Swarthmore's Moodle site (https://moodle.swarthmore.edu) with their Swarthmore username and password.
To add a Haverford or Bryn Mawr student who is not enrolled in a Swarthmore class, you can turn on guest access to your course. Most faculty set up a guest password to protect the contents of their Moodle course. For more information, see Making a course available to students