Such students should get special treatment not only by instructor but also by someone trained in that field and the school should step in. Student with learning disability can frustrate both an instructor and other students since lots of time and attention is spent on them. The solution is that extra hours should be reserved for such students in the form of private tutoring which brings them to the level of the class and avoid frustration in the class. I think the Federal law does not extend special treatment for disabled students after the age of 21. The school should find the means.