Distance learning is a general term used to describe an instructional approach where learners and instructors interact, but are separated by time or place. Actually, distance learning has been around for a long time. Correspondence courses, for example, are a form of distance learning. So are live satellite broadcasts of training programs transmitted to viewing sites across the nation.

An array of technologies, from traditional to state of the art, are used to support distance learning. Examples include the print medium, radio, telephone, television, satellite broadcasts and now, the Internet. Some of these technologies, such as conventional broadcast media, provide "one way" communication only. Others can support real interaction between instructor and learner, or "two way" communication, such as the telephone or e-mail.

Many distance learning activities combine the use of technologies. For example, satellite broadcasts often include toll-free phone numbers for viewers to call in questions and Internet message board for follow-up discussions. There is no single medium that is best for distance learning; all have their advantages and disadvantages.

Distance learning and public health

The Centers for Disease Control and Prevention (CDC) has chosen a distance learning strategy to deliver much of its training to the public health workforce. Why?
- The workforce is widely dispersed, making it expensive in time and money for instructors to travel to the learners.
- Instruction using a distance learning strategy can be designed to allow learners to fit the instruction into their schedules when it is convenient for them.
- Instruction using a distance learning strategy can be designed to allow learners to progress at their own rates; they can skip over what they already know or repeat parts they have difficulty with.
- When the primary purpose is to provide information, a distance learning strategy can be used to provide the same information simultaneously, usually by satellite, to a nationwide audience.

To become more familiar with distance learning and how you can benefit as a public health professional, click on: