Because of time and distance constraints, eLearning instructors are not able to observe how learners interact with their learning environments. (elearningindustry.com)
Many schools also offer part - time and distance learning options to accommodate students who are currently working or otherwise unable to attend the program on a full - time basis. (veterinarymedicinecareers.org)
If a person returned to the home location between trips, the total travel time and distance would be much larger. (sciencedaily.com)