The State School Board has adopted a rule that is not likely to be used for now. It’s a rule that says students at “persistently dangerous” schools can transfer to another school. The state board has to have that rule under education laws pushed by the Bush Administration. Each state can define “persistently dangerous,” and Missouri’s definition means no schools qualify or even come close. Missouri’s rule describes a “persistently dangerous” school as one in which there has been a violent criminal offense or a gun violation in three consecutive years. It also has to expel at least one percent of its students in two of those years.