[quote=AN]
And the voucher system as you described will achieve the exact opposite, by mixing kids with different skills and socioeconomic backgrounds even further.[/quote]
Don’t count on it. When parents get to choose their school, it means that parents who like the same things will tend to choose the same schools.
If the parents choose first, then a lottery is used to decide who gets their first choice, then there is a bit of self-selection going on there.
Schools may even tend to gear their school to a specific kind of student.