I had kind of the same situation. My parents are paying for my school, and I had to get their approval first too. I just sat down with them and told them why I wanted to join a sorority, and gave them as much information I could. Since it seems like you're worried about the issue of grades, make sure you talk to your parents about how you'll be able to manage the time commitment of sorority. Before you sit down and have that chat, make sure you get some of the information off of your school's Greek Life website. What mine were most concerned with was cost, time commitment, hazing, and partying. As other posters have said, some websites will have an FAQ for parents; if they do, print out and give it to your parents. If you approach them in a mature way, they are more likely to respond agreeably. Good luck!
