Many students working towards a high school equivalency diploma, including students in GED® adult education programs, may have learning disabilities, although many of those students have never been diagnosed. According to The Neurobiology of Reading and Dyslexia, by Sally E. Shaywitz, M.D., and Bennet A. Shaywitz, M.D., approximately 85% of people with learning disabilities have some type of reading disability. That percentage applies to all people with learning disabilities, whether or not they are enrolled in a GED®, HiSET®, or TASC™ adult education program.
So while students with learning disabilities include students with various types of learning disabilities, the most common learning disability is a reading disability.