The progression from each stage to the next involves a process «of increasing differentiation and complexity of
organization that endows the organism, social
system, or
whatever the unit in question may be with greater capacity to adapt to its environment than... its less complex ancestors.
Schools have changed relatively little, mainly because of turf battles fought by the knot of
organizations that we politely call «the education
system»: teachers unions and school boards try to protect their monopolies, publishing companies try to reinterpret all new ideas back into the profitable forms of the past, various levels of government try to protect their relevance by getting in front of every new concern, pretending to lead while aggressively and often destructively following
whatever trends they have the wit to perceive.