Georgia’s new Special Needs Scholarship program was built on the promise that public school families of disabled children would get more schooling options. It was, nonetheless, a disappointment for most first-year applicants. According to state Department of Education figures, of 5,750 families who applied for a tuition voucher, 85 percent either couldn’t find a campus to accept their children, couldn’t afford the additional private school costs or didn’t meet all of the scholarship’s eligibility criteria. Nearly 900 families are getting financial aid, however, and supporters are convinced more children will be helped next year if more schools are willing to accept the vouchers. State lawmakers narrowly passed Georgia’s first K-12 school voucher program in the spring. Modeled after a Florida program, the plan was to give families of public special-education students more educational choices by offering them tuition vouchers to use at participating private schools. When the program opened this summer, education department and school officials were flooded with telephone calls, e-mails and applications. By the September deadline, thousands had applied. Late last month, 899, or 15 percent, of them received tuition checks. Families looking for vouchers were stymied partly by timing. Still, families, special education advocates and private school administrators say one of the biggest obstacles to finding a new school was the cost. Parents are expected to pick up the tab for any tuition the voucher does not cover, as well as expenses such as transportation and physical therapy.