The two types of ineducable students are the defective and the disinterested; the defective have measurably insufficient intelligence while the disinterested are either emotionally undeveloped or simply unwilling to participate in what, to them, holds no foreseeable purpose.
The school system insists on mainstreaming both types to the detriment of all and believes firmly they are doing the "right thing."
Follow-up studies on the disinterested show that at later stages of life many suddenly see the benefit in education, usually specific education for vocational or social-acceptance reasons.
The defective however are always dependent on others for much of their daily needs and recall mostly nothing of those years kept cooped up except the other students about them making their lives miserable with taunts and ostracism.
No Child Left Behind institutionalizes and mandates this blueprint for failure and will bring nothing but fraud and disappointment.
Not one of Bush's better moments, this plan. My girlfriend and I agree on this, but not much else. She's an avid liberal, and basically agrees with your statement that you can't force kids of different types (unable to learn vs. unwilling) into the same standards.
Where we disagree is how far to take it. She says the federal gov't should stay out of the schools, but when I say "So, you think we should eliminate the Department of Education," she disagrees, but can't come up with a real reason why.