This is my son at school working. He utilized the SIS program in Pre-K and he will now use the McKay Scholarship to attend private school.
I have listed states with school voucher programs for children with disabilities. There are stipulations with each state but all of them require an established IEP. Please carefully read the material on their website for specifics. I have provided the links for ease of use.
Arkansas
Students with disabilities
Students must an Individual Education Plan (IEP)
https://arksped.ade.arkansas.gov/
Florida
John M. McKay Scholarship (K-12) - Students with certain disabilities
Students with IEPs
http://www.fldoe.org/schools/school-choice/k-12-scholarship-programs/mckay/
The Gardiner Scholarship (PLSA) (Ages 3 - 12th Grade) can be used for "schools, therapists, specialists, curriculum, technology – even a college savings account" Must have an IEP or a formal diagnosis from a physician. Check the website for additonal requirements https://www.stepupforstudents.org/for-parents/special-needs/how-the-scholarship-works/
The following program is for (VPK) Office of Early Learning Specialized Instructional Services
http://www.floridaearlylearning.com/providers/provider_menu/specialized_instructional_services_providers.aspx
Georgia
Special Needs Scholarship Program - Students with certain disabilities
Students must also have an IEP plan in effect
https://www.gadoe.org/External-Affairs-and-Policy/Policy/Pages/Special-Needs-Scholarship-Program.aspx
Indiana
Students with an Individual Education Plan (IEP)
A household income not exceeding 200% FRPL
https://www.in.gov/doe/
Louisiana
Students in grades K-8 with Individual Education Plans (IEPs)
Who have been diagnosed with certain disabilities and live in an eligible parish
https://www.louisianabelieves.com/schools/school-choice-for-students-with-disabilities
Mississippi
Mississippi Dyslexia Therapy Scholarship for Students with Dyslexia Program Students
Grades 1-6 who have been diagnosed with dyslexia OR students in grades 1-6 who meet the IDEA definition of having a speech-language impairment.
http://www.mde.k12.ms.us/TD/news/2015/06/18/mde-releases-application-for-special-needs-scholarship-program
North Carolina
Special Education Scholarship Grants for Children With Disabilities
Students with an Individual Education Plan (IEP) who are not already placed in a private school at the district's expense
http://www.ncseaa.edu/CDSG.htm
Ohio
Autism Scholarship Program & Jon Peterson Special Needs Scholarship Program
Statewide, public school students diagnosed with Autism; special needs students with a current Individual Education Plan (IEP)
http://education.ohio.gov/Topics/Other-Resources/Scholarships/Special-Needs-Scholarship
Oklahoma
Lindsey Nicole Henry Students with Disabilities Scholarship Program
Any student with a disability who has an Individualized Education Plan
http://osfkids.org/about/
Utah
Carson Smith Special Needs Scholarship Program
Students with certain disabilities that also have an Individual Education Plan (IEP)
http://utaheducationfacts.com/index.php/tools-for-parents/school-options/151-carson-smith-special-needs-scholarship
College Scholarships for Students with Learning Disabilities
http://www.finaid.org/otheraid/ld.phtml
If I have missed any programs please send me an email so I can research and include it.