philosophy presentation

In my philosophy class we all have a presentation to do thats worth twenty percent of our grades. I find this class interesting, but difficult and the grading of this project somewhat worries me. the whole class evaluates your presentation, each student has a sheet where a 0-5 score must be given based on your performance of the project/presentation. this worries me because the philosophy students in the class have a much better understanding of the topics we are discussing than i do, not only do they critique presentations but they have a question session with the presenter after the presentation where they seem to really grill the presenter on what i seem to see as difficult questions. Being twenty percent of my grade, i would prefer the teacher to solely grade my project because she knows i have never taken a philosophy class, being i am a political science major. I have seen a few presenters like myself with some, but little, knowledge of philosophy and the philosophy majors destroy them after the presentation with questions, and if you cant answer these hard questions they ask they give the presenter really bad grades. i guess my point here is that i simply wish the question session of this project was somewhat more relaxed, because when i have to talk about "freedom of self" i know im going to be in trouble when it comes to answering questions. i was wondering how many other people have had to do a presentation worth a good part of your grade, and that the grade is based on kids in your class and not the teacher...