South Carolinians for responsible Government writes,

South Carolina has sharply increased spending on public schools for forty years. The results have been disappointing. In the past ten years legislatures in Arizona, Wisconsin, Michigan, and Florida have passed school choice measures. Scholars have found results so positive that President Bush in January, 2004 signed a bill from Congress authorizing a school choice program in Washington, D.C. School choice not only leads to happier parents and students among those who choose independent schools, it leads to dramatic improvements in public schools. School choice frees principals and teachers to focus on teaching students rather than pleasing bureaucrats.

South Carolina is trying to create a school choice program, they write,

Although there are different types of school choice programs, SCRG supports the “Put Parents in Charge” proposal that uses a state income tax credit to create school choice. “Put Parents in Charge” will provide tax credits to parents who choose to home school, transfer to a different public school, or use a private school for their child’s education.

Those who do not have state tax liability due to low income are eligible to receive scholarships from Scholarship Granting Organizations (SGOs) that will be established by non-profit organizations.

If a child chooses to attend another school, the district he leaves will retain all federal and local education monies. Ultimately, school districts will have more money to spend on fewer students, thus increasing per pupil spending.(emphasis added)

They also give a good overview of how the program is designed to work.