I clipped out just a single paragraph because it was such a tasty opportunity to practice my critical thinking skills.
Homeschoolers consistently outperform conventionally schooled children. Across the US and internationally, independent and parochial schools consistently outperform State (government, generally) operated schools. Across the US and internationally, competitive markets in goods and services consistently produce better goods and services at lower cost than do State-monopoly enterprises.
The first sentence "Homeschoolers consistently outperform conventionally schooled children" seems to imply that something inherent in homeschooling is causative. So I'll start with a related example to show where the fallacy lies.
It was once presented to me that both the diet and exercise programs used in the military were proven to extend life and increase overall health. The evidence for this was the improved health of older members of the military and those who had retired from the armed services.
Two things make these statistics bogus. The first is that you can't join up if you have a serious congenital defect. The second is that when active military members develop disabling illnesses, they are discharged. The combination represents a selection process which is similar to homeschooling.
Those most able to succeed are self-selected going in, and those who fail at homeschooling are put back into the public school system. How does self-selection work here? The very people who are interested in homeschooling are the parents interested, and active in, their child's education. Homeschooling doesn't produce better kids or parents, better kids and parents produce homeschooling.
Where's the "fallacy"? Homeschoolers outperform conventionally schooled children. That's a fact. Or, it's a reasonable statistical generalization. Marplots criticizes the implied
explanation of that fact, that homeschooling, as a process, produces a better result than conventional schools would produce with the same material.
It's difficult to conduct controlled experiments in public policy in a free society.
When assessing the impact of homeschooling one could:...
(a) compare homeschoolers to conventionally schooled children in the same jurisdiction, controlling for as many factors as you like
(b) compare total system performance (all children) before and after easing or tightening restrictions on homeschooling
(c) compare total system performance of jurisdictions with relaxed restrictions on homeschooling to total system performance of jurisdictions with tight restrictions on homeschooling
(d) compare the change in total system performance before and after easing or tightening restrictions on homeschooling to changes in total system performance in jurisdictions than had made no policy changes.
In any case, parents in a free society can opt out of or into a group by moving out of or into a policy regime.
Seems to me there's sound reason to suppose that relaxation of restrictions on homeschooling will improve overall system performance. Consider a two-dimensional classification of families with regard to homeschooling: a continuum of means and a continuum of interest. (+, +): Parents have means and interest (these homeschool if the law allows).(+,-): Parents have means and no interest (these do not homeschool, regardless of the law). (_,+): Parents have insufficient means, and would if they could). (-,-): Parents have neither means nor interest. By the argument above,
against the conclusion that homeschooling is superior, a system that allows (+,+) parents to homeschool will outperform a system that does not.
So what about parochial or private schools? There's a selection bias there as well. The kids with parents who can afford the payments will already do better, both in school and in life. And what happens when a kid fails to meet the standards (educationally or behaviorally)? Why they get expelled and put into a public school after all.
Evidence is against this explanation.
Joshua Angrist
"Randomized Trials and Quasi-Experiments in Education Research"
NBER Reporter, summer, 2003
One of the most controversial innovations highlighted by NCLB is school choice. In a recently published paper, my collaborators and I studied what appears to be the largest school voucher program to date. This program provided over 125,000 pupils from poor neighborhoods in the country of Colombia with vouchers that covered approximately half the cost of private secondary school. Colombia is an especially interesting setting for testing the voucher concept because private secondary schooling in Colombia is a widely available and often inexpensive alternative to crowded public schools. (In Bogota, over half of secondary school students are in private schools.) Moreover, governments in many poor countries are increasingly likely to experiment with demand-side education finance programs, including vouchers.
Although not a randomized trial, a key feature of our Colombia study is the exploitation of voucher lotteries as the basis for a quasi-experimental research design. Because demand for vouchers exceeded supply, the available vouchers were allocated by lottery in large cities. Our study compares voucher applicants who won a voucher in the lottery to those who lost. Since the lotteries used random assignment, losers provide a good control group for winners. A comparison of voucher winners and losers shows that three years after the lotteries were held, winners were 15 percentage points more likely to have attended private school and were about 10 percentage points more likely to have finished eighth grade, primarily because they were less likely to repeat grades. Lottery winners also scored 0.2 standard deviations higher on standardized tests. A follow-up study in progress shows that voucher winners also were more likely to apply to college. On balance, our study provides some of the strongest evidence to date for the possible benefits of demand-side financing of secondary schooling, at least in a developing country setting.
Similar random lottery experiments with tuition vouchers in the US yield similar results. Parochial and independent schools outperform government schools.
Public schools are tasked with teaching everyone, from all areas of the bell curve, and all the bell curves in play - emotional, behavioral, intelligence and so on.
The State cannot compel attendance at school without definitions of "attendance" and "school". Virtual schools play with both terms.
Let's pretend that we have a common agreement on the meaning of these terms. Now let's play with the notion of "government employee".
Given compulsory attendance statutes and State subsidization of schooling, one could imagine a polity in which 90% of students take tax support to independent and/or parochial schools. Compulsory attendance means little unless there is some school that is required to accept the 10% of students whom all other schools have rejected. Call these default-option schools "the public schools". Governments could put the contract to operate these schools out to bid every five years or so to mitigate the formation of insider interest groups.
As to:...
Public schools are tasked with teaching everyone...
...the competitive environment extends to the kids as well. If you have a dud kid, no one wants them. If you have dud parents, homeschooling might be disastrous.
Some districts already contract-out to private (parochial, even) schools the care of SMH (severely multiply handicapped) and other students at the extreme tails of the bell curve.