A teacher or admin can enrol them manually using the link in the Course Administration menu within the course.

A course can have a password defined, known as an \"enrolment key\". Anyone who knows this key is able to add themselves to a course.

'; $string['enrolmentkeyerror'] = 'That enrolment key was incorrect, please try again.'; $string['enrolname'] = 'Internal Enrolment'; $string['enrol_manual_requirekey'] = 'Require course enrolment keys in new courses and prevent removing of existing keys.'; $string['enrol_manual_showhint'] = 'Enable this setting to reveal the first character of the enrolment key as a hint if one enters an incorrect key.'; $string['enrol_manual_usepasswordpolicy'] = 'Use current user password policy for course enrolment keys.'; $string['keyholderrole' ] = 'The role of the user that holds the enrolment key for a course. Displayed to students attempting to enrol on the course.'; ?>