An essential crux of Race to the Top is the concept of measuring how much growth teachers provide to students in a year. In business, this is often described as a "value added" factor. While it seems perfectly reasonable to want to assure a teacher adds to a student's education, creating a measurement system using sound, statistical methodology is unobtainable. In a business environment, the unit to which a value added factor is measured, the value added is the variable that is not constant. In a classroom, the lives of the students are hardly constant. Some teachers have a 50 percent or more turnover of students in their classes each year. And many of these students have moved so often that they have educational gaps. Additionally, many students have issues in their lives that have profound impacts on their ability to make educational progress. I have had students who have had parents die, have addiction issues and even mental health issues. None of these factors are accounted for in Race to the Top.