Two groups (among others) abet the destruction of our public schools as educational systems: boards of education and professional educators .
Board members -- pursuing megalomaniac visions and frequently not understanding what it takes to run a real school with real warm bodies in it -- are too often ready to sell out to any political interest that assures them continuity of office.
Professional educators -- through their formal and in-service education -- have been so stuffed with flatulent conjecture, minimally substantiated, often contradictory, sketches of theory, mental fluff that passes for science, that they cannot deal effectively with simple organizational and classroom problems.
Undisciplined conjecture, expanded through leaps of logic and magnified by fear or fervent hope generates the bulk of topics of discussion not only in Education, but also in the world at large.
Public schools, especially, are vulnerable to political meddling, to intrusions by ideologues of all kinds, for whom conjecture is a way of life, so long as others bear its consequences.
To examine these issues further, see Conjecture Pollution: Poisoning Educational Practice