AP reports on the growing number of school voucher initiatives across the country: 

As of mid-July, at least 30 states had introduced bills that would use taxpayer dollars to send children to private schools, most limited to poor or special needs children, according to the National Conference of State Legislatures. That's compared with nine voucher bills in 2010, just one of which passed — a special needs voucher program in Oklahoma.

At least six states have passed voucher or tax credit legislation this year. Some of the programs are based on income, some based on disability, while others are available for anyone who wants to take advantage.

Before this year, school voucher and scholarship tax credit programs were operating in 12 states and Washington, D.C., serving nearly 200,000 children, according to the Alliance for School Choice.

Meanwhile, a trial challenging the voucher program in Colorado's Douglas County is under way this week. The Denver Post reports on the testimony of a father concerned about the impact of vouchers on the public school system.