I disagree with people who abuse their privilege and use having a disability as an excuse to get by in school. We are lucky to have disability services that can provide accommodation for us but people who abuse it just make the rest of us look bad.
Another things about disability is I do not look at fatness as a disability. I have a mental disability and yes I do get help, but I also worked to fix it so it wouldn't be as bad. I had to work at spelling and writing, just as much as someone has to work at running track or playing a sport. If you are over weight you need to help yourself and not look at your weight as a disability. If you eat healthy and exercise and still overweight then yes maybe it does classify as a disability but I think that if people who are overweight start paying attention to their body they will notice they don't need as much help as they thought.