Add the ability to 'Deep Link' into any Level of the Course - Course Home, Module, SubModule or Lesson. EX: I email my student a Link to a particular Lesson (https://www.mydomain.com/courses/courseName/moduleName/this-is-the-lesson)

When they land on the Login Page it remembers the URL and after Logging In the student is taken directly to the Lesson. If by chance they are Not Enrolled (or the Course is Not 'Free') a Warning Message will be triggered and the student would be sent to the Customer Center.