Look into the Illinois Institute of Art Chicago. It is a very good school and is FIDER accredited. They also have an excellent interior design program. Here is a link to their website:
http://www.ilic.artinstitutes.edu/ Also if you are interested in online education, check out the Academy of Art College based in San Francisco, CA. They are one of the best and offer online education up to bachelor degree level. Beyond that, hop on google.com and search on interior design schools. Hope this helps you, and good luck!
~Ravyn
