"Development of others" appears consistently in leadership competency frameworks; managers are now being asked to think of themselves as teachers in addition to their myriad other roles. Little empirical evidence however seems to exist that managers who teach their employees learn to lead better, generate more employee satisfaction and are indeed more effective than those who do not. Twenty managers and forty-three of their employees participated in this study. Data were collected from both groups before and after the managers attended a workshop designed using activity systems theory....