High School Mission Trip Help?

Hello, I'm a high school student and I really want to do a mission/service trip this summer, around August, but I have no idea what to do! I really want to help with reconstruction and things like that. I'm trying to find a group that isn't all about religion because I, myself, am an atheist. I realize that most groups have religious affiliation, but if I ended up doing one of those, I'd rather not end up with a group that prays every night and all they talk about is od and stuff like that. I'd like to help with a group in the US, but anywhere would be fine. Well thanks for all your help!