In boot camp I remember having been assigned by the company CO one of the 'tards in the company to tutor. There were several of us given this assignment, one-on-one. I was told my primary task wasn't to get this moron to be able to take the written tests on his own but rather to get him to memorize the answers as best he could then sit next to him during these tests and make sure he answered enough questions correctly to pass the exam. I was further told that the CO knew I (and the others selected) would easily breeze through these tests so we had the time to make sure our 'tard passed too.
I remember people asking me afterwards if boot camp was tough, and telling them that no, that there were so many really dumb people who continuously f*cked up even with specific instructions that if you just did what was asked you had no problem at all, which was the truth