There’s been an increase in discussion recently regarding Milwaukee’s Voucher Program largely around Amanda Poulson’s recent article in the Christian Science Monitor:

Hers is the sort of story Milwaukee’s school-choice advocates cite when touting the oldest and largest voucher program in the country. Now it’s expanding, but 16 years after it began, the policy is still controversial and has shown few documented benefits.
Proponents say it gives options to low-income kids who might otherwise be stuck in failing schools, and that the competition for students is good for all Milwaukee’s schools, both public and private. Critics, meanwhile, cite the money the program drains from public schools and the highly uneven quality of the private ones, which aren’t held to the same standards.