Keep reading the poems in class! When I was in HS I gave several talks in front of my classroom. The first one was the worst, my knees were shaking, it was hard to start talking, I think that I take the double time to speak than a normal person. The day before that talk I thought in not going to school, but I went because I didn't want to leave my schoolmates with one less participant (the talk was in groups). I don't know your case, but I didn't have support from my schoolmates (they felt pity). So, if you don't have it, it is not a major factor. Moreover, four person used to laugh at me every day (they were laughing at me in the first talk). As I already said, keep going, giving those talks taught me to ACCEPT it. In my last three talks I wasn't nervous, my knees weren't shaking I didn't take extra time to speak. And more important, it taught me not to avoid my speech. I gave like 9 talks in two years, I don't know the exact number. Good luck.