Through out my life, and trust me it's been a long life, I have met so many different cultures, life experiences and not to mention different languages..I took something from everyone and applied it to my life. If you told every student to describe an apple , you would have several discussions..over an apple ! But someone will learn something new no matter what the other person said. Even if one person does not like apples. He might end up trying one. Putting people together to discuss a part of a subject not only opens up their shyness but helps them retain a little more . Especially, test time !