Modified Diploma
A special type of High School Diploma designed specifically for special education students who can't meet the requirements to graduate high school due to a disability. It is basically useless. You can't use it to go to a college or anything. Not even community colleges will accept a Modified Diploma.
Bobby received a Modified Diploma because he was mentally retarded. Now, everyone is congratulating him at graduation even though he didn't have to meet any requirements to graduate.