It's a vicious cycle. People judge you, they put you down, they give you bad grades. Then you feel bad about yourself and it shows in your face, in the way you walk, in the way you talk. And then that image you give off makes people want to put you down even more.
Dammit let's break this idiotic cycle.
Look calm, smile, look happy, and people will respect you for it. (even though there's a raging storm inside of you, but they don't know that, do they?) Effie Trinket style. That's why some people like Effie Trinket-- they like her for her tenacity on stage in times of stress.