How do I deal with my arrogant and annoying older sister?

What you need to do is try to keep your distance from her. Yeah I know that its not going to be easy living in the same household but all she really wants is attention. Keep doing great in school, Dont let her be a distraction to you and your school work. Also talk to your parents and tell them , in a calm and rational manner, how your sister makes you feel. Hang in there. Things will get better. Need any more advise just e-mail me at advice_from_experience at yahoo. good luck