Advocates and legislators are pushing for Indiana to become the one of almost 30 states that have a work-share program.
Indiana awarded 19,809 private school tuition vouchers for the 2013-14 school year, up from 9,139 last year and 3,911 two years ago.
More than 20,000 Hoosiers applied for Indiana's private school vouchers this year.
The Indiana Senate on Wednesday passed a bill that allows more students to become eligible for the state's school voucher program.
More than 9,000 students are taking part in Indiana's voucher program, but the state has allocated enough money for up to 15,000 students.
The number of vouchers awarded this year has not reached the cap of 15,000 that was set by state law, but it is at least double the 3,919 awarded in 2011.
Two sides debated Indiana's voucher program in a preliminary hearing Thursday.