A school voucher, also called an education voucher, is a certificate issued by the government, which parents can apply toward tuition at a private school (or, by extension, to reimburse home schooling expenses), rather than at the state school to which their child is assigned. An alternative to the education voucher is the education tax credit, which allows individuals to use their own money to pay for the education of their children or to donate money towards the education of other children.
Under non-voucher education systems, people who currently pay for private schooling are still taxed for public schools; therefore, they fund both public and private schools simultaneously.