Which X-Men storyline takes place first, X-Men Origins or First Class?

At first I thought First Class took place further back in time than Origins but then I saw the movie. There was a scene with Wolverine in First Class. My dad said it Origins took place first and Wolverine never ages. But in Origins there's so much high-tech equipment I don't think it will take place before First Class. So anybody know which X-Men is further back in time, Origins or First Class?