How is my Team Score calculated?
First, check out the "Challenge Rules" for the challenge in which you are currently participating, by clicking on the "View Challenge Rules" link on the featured challenge home page. This will explain how the team scores will be calculated during this specific challenge.
If team scores are calculated using an average, the score will be the total number of steps accomplished by everyone on the team added together, and then that total number is divided by the number of people on the team.
Teams are ranked according to what each member on that team is averaging. To view where your team is ranked, click on the "Team Leaderboard" tab on the featured challenge home page.