Qualification For Promotion

I read of a principal in a high school who had an administrative post to fill. He promoted one of his teachers with ten years of teaching experience to the job. When the announcement was made, another teacher in this school came to him terribly upset. She said, “Why did you put that teacher in this position? He has only had ten years of experience, and I’ve had twenty-five years. Yet you passed me over in favor of him.” And the principal said, “I’m sorry; you’re wrong. You haven’t had twenty years of experience. You have had one year’s experience twenty-five times.” (Source unknown).