This is a period of unrivaled education reform. Charter schools, teacher merit pay, diversity policies - all efforts to improve what many see as a failing public school system. But every effort needs evidence as to whether it is working. Much of it comes from standardized testing. That puts even more emphasis on the most effective way to analyze the growing amount of data. The information is being used in all kinds of ways, from what classes a student takes to teacher merit pay and, in some cases, termination.