Thank you for all your help everyone!!
Unfortunately, I highly doubt that a teacher at my school would be in a sorority. Reason being that my high school is extremely liberal and talking about Greek life is passe. In fact, many teachers urge us to stay away from it!
But, I will ask my sister if she still keeps in touch with her Greek friends to see if I can have some recs/letters of intro written for me.
BTW, I know that recs on the West Coast aren't an important thing -- I just wanted to stand out

.
Thank you again for all your help!