As you know, now everything is managed From this Area(Member’s Area). Admin Tab which used to appear on Single Course Page is no longer functional because adding students in a course is managed from here.
From Instructor Control’s Section, Click On Manage Courses – Click On Admin Tab and add the students in the course from here, you can either search a user by his username or with the email id.
There are sorting options available here, so you can actually sort students on the basis of their course status, on the basis of their access status.
