Collective bargaining for teachers a horrible thing?

Only 5 states do not have collective bargaining for educators and have deemed it illegal. Those states and their ranking on ACT/SAT scores are as follows:


South Carolina -50th

North Carolina -49th

Georgia -48th

Texas -47th

Virginia -44th

Wisconsin, on the other hand, with its collective bargaining for teachers, is ranked 2nd in the country.

What's all this tell you, folks?
 
(Thanks and a hat tip to friend Andrew L. for this information).