Some may say that the US States to the left of the graph in figure 1 (lower performing than the US average) might want to investigate what the US States to the right of the graph (high performing) are doing differently and determine whether adopting or adapting those practices may help their students' educational gains and test performance.
Has anyone demonstrated that the students in differing geographical areas are equally educatable? If student potential varies, then doesn't that need to be taken into account when evaluating the education systems? If low potential students obtain average results, they must be in a high-performing education system, right?
