Laughing at me and my theory test result

The class I go to must be the worst class to imagine for a teenager. My classmates are full of anger and envy about just anything. Even though the majority of them is already of age, they behave as if they were still in their childhood times, they are like children laughing at anything you do wrong. Being asked to present something in front of the classroom I always feel like in a circus, as if I was the clown they laugh at! I remember an incident which my best friend was involved in. One day he got confused and came to school wearing two different shoes on his feet. That was just a single incident, but it was enough for the colleagues to make a sacrificial goat out of him. You know - the so called fall-guy. Every single failure in any discipline could mean the end of normal relationships with the most of our environment. Now you know why I was so afraid to take the theory test. My driving course was something everyone knew about and they were just waiting for me to fail that theory test. And it happened... I blew it up and the theory test needs to be retaken. Of course the news has spread right away and now they laugh at me... I am the main fall-guy - what shall I do to regain the respect and change the way they perceive me?