AP Statistics

Hey babes! So I have AP Stats and my teacher is kind of goofy. He has a Portuguese accent and like it's really hard to understand him sometimes. But he ignores me I swear! My sister had him last year and she said that he can hear everything. Well yesterday I was in class and he asked us a question and the answer was unusual factor. Well everyone in the class was looking for the answer so it was wicked quiet. I said "unusual factors" in like a normal talking voice so he should have heard me with the quiet class. He just looks around waiting for someone to give him the answer. So a little bit louder, "unusual factors." Same reaction. Then I like yell "UNUSUAL FACTORS." He is still looking around waiting for someone to answer. The only reason he acknowledged me that time is because my ring hit the desk and made a noise. Then I calmly stated my answer. Then like two minutes later he asked another question and the answer was spread. So again, everyone else was looking for the answer and I said spread. He didn't hear me. So I say it a little bit louder. Someone else hears me, says "spread," and he hears them. I don't get it.