In curling, all scoring happens in the house. It doesn't matter where in the house the stone lies. Additionally, only one team can score points in each end. There will never be a case in which both teams score points in the same end. In order to score an end, there are three rules to follow:
No matter where a stone is in the house, it is worth one point. This means that a team can score as few as zero points, or as many as eight points in an end. For example, if a team has three stones in the house, they can earn a maximum of three points.
In order for a curling stone to be considered for scoring, some part of it must be in some part of the house. This means that if some part of the stone - no matter how large or small - is in the house, the stone is can be considered for scoring. Essentially, a stone in the 4 Foot and a stone just touching the 12 Foot are both equally eligible for scoring.
A biter is a stone that is just touching a certain part of the curling ice. For example, if the edge of a curling stone is touching the 12 Foot, one would say that the stone is biting the 12 Foot. This concept applies for the 8 Foot, 4 Foot, and Button as well. Any stone that is biting can be considered for scoring because part of the stone is in the house.
Now that the shot rock has been identified, the next step is to identify the second stone closest to the button. This is referred to as the second shot rock or second shot stone. If this stone is the same color as the team with the shot rock, they will receive an additional point. This process continues until the successive shot stone belongs to the team that is not scoring. Therefore, the scoring team will earn points for the total number of stones that were closer to the button than the opponent's closest stone to the button.