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Almost all the evidence is based on lotteries and addresses attrition. Expelling bad students is a potential problem, but students are tracked across schools.
by tristanz 12y ago
Almost all the evidence is based on lotteries and addresses attrition. Expelling bad students is a potential problem, but students are tracked across schools. Some students are lost, of course. However, the evidence in the KIPP study shows that attrition actually raises the scores of the lottery losers more than lottery winners. This is because winning the lottery encourages some bad students to stick with it.
- IndianAstronaut 12y agoI don't see the lottery as a bad thing. It lets kids ezcape from a bad environment. In a inner city public school, there is often too much peer pressure which forces the kids into poor performance or gang life.
- bsder 12y agoThe lottery is not a bad thing. And, I'm not even against non-lottery based selection for schools. They are allowed to do so. The only issue is when trying to compare private school type X vs public school Y. Public school Y is required to take all comers ... no exceptions. If you want to claim that Private School X is better, worse, etc. you need to control for that because the worst students consume the most resource--even the expulsion of just a very small number of students can make a disproportionate difference.