LEEECCTTURRRES arrgg

So I don't know if any of you have the same trouble I do but I can not pay attention in lectures. My geology lecture I have with my older sister and a friend who I went to high school with. Having people I know and am close with makes it hard to begin with. There are sooo many people in lecture halls that its very easy to sit back and relax daze off maybe even take a nap but noo thats bad because when it comes time for me to take a test I have learned nothing. Even when I am very focused my sister constantly whispers stuff in my ear because really the only time we see each other is in that class. Anyways I need to learn how to pay attention in class but its harrrrd to focus.