"Each day, about 5 million children walk into 274,000 classrooms nationwide and find a substitute. Students today will spend at least one full year with a substitute by the time they graduate from high school -- a figure that's higher in poor schools and destined to increase." The situation today has worsened. It is estimated that more than 300,000 classrooms and over 5.5 million students are taught by substitute teachers each day in the United States.In...