Earl,
If I understand you correctly, your company tends to hire those who have "grown up", so to speak, within the industry. High retention allows for that experience to be evident in the classroom. It needs to be a win-win, however, so that the faculty member feels valued and, therefore desires to continue with the company. It sometimes comes down to those little things you do for employees that determines whether they stay or go. Retention can depend on multiple factors, some of which the manager has total control over, others not so like salaries.
Dr. Patricia Kapper
