How to individualise job instruction

Instructors and supervisors have an acknowledged hard job. Explaining, demonstrating, setting to work and correcting errors all day long is extremely demanding. Often we hear our instructors, supervisors and chargehands complain that over the years their job is getting no easier. What do they specifically complain about? They complain that the pace of technological change brings in new skills almost daily, and, conversely that old skills disappear without trace almost overnight. They also complain of the apparent decline in standards of literacy and numeracy and the willingness to work among sections of the younger work force.