Preparing to Teach Online 
As with traditional instruction, there are three critical evaluation 
points in Web-based instruction—course startup, course progression, 
and course ending.  Using a flight metaphor, this article provides 
20 guiding principles for these three critical junctures: Preparing 
for takeoff—Principles 1-10; Airborne—Principles 11-19; and Coming in 
for a landing—Principle 20.