MIDDLETON, Wis. -

Gov. Scott Walker says his Democratic opponent and Madison school board member Mary Burke is not doing enough to help close that district's achievement gap.

Walker on Wednesday hammered Burke for not supporting expansion of the private school voucher program, which he said would give students another option. The program makes taxpayer money available for students to attend private school.

Burke opposes the statewide voucher program and says if elected she would end it outside of Milwaukee and Racine.

Walker also says Burke is hurting the Madison district by not arguing for implementing Act 10, the law that forces teachers and most other public workers to pay more for pension and health care benefits.

Burke says the best way to improve student achievement is ensuring there are quality teachers.