This typically involves an instructor leading a group of employees. He often uses slides, case studies, discussions, question- answer sessions, and role playing. Actively involving trainees enhances learning. When the course objectives call for presenting information on a specific topic to many trainees, classroom instruction is one of the least expensive and less time consuming ways to accomplish that goal. Technology has expanded the notion of classroom to classes of trainees scattered in various locations. With distance learning, trainees at different locations attend programs over phone and computer line.