In Class: ideal group work situation

I have experienced some terrible group projects in my life, but if I had to chose my perfect group experience it would have to start with everyone contributing. I would like the group members to ALL want to make the same grade I do (an A) and understand that it will take a lot of hard work to gain this grade. Some people are not as motivated as others, and this is problematic when a person needs to accomplish a certain grade, but the project relies on the other people efforts. I would also like the group to comunicate well, this way everyone would be on the same page.