Thanks , that is easily searchable . Honestly , I would like to believe OP ' s position , but I struggle to square it with my experience in bad public schools both growing up and with my children . For anyone else interested , here is the linkDo Teacher Unions Hinder Educational Performance ? Lessons Learned from State SAT and ACT S c o r e s h o m e i s s u e s h a r v a rdeducationalreviewvolume 70 issue 4 h e r a r t i c l e l e s s o n s l e a r n e dfromstatesatandactscores 130 And here is a summary of the article for those not interested in purchasing the articleDO TEACHER UNIONS HINDER EDUCATIONAL PERFORMANCE The study s a y s t e a c h e r u n i o n s h i n d e r e d u c a t i o n alperforamncethestudysays <| sep |> check mangaupdates to see where the anime branched off to the original ending