To find out in what ways the teacher’s behavior in interactions could motivate students effectively,a two-day observation concerning the relationship between the teacher’s behavior in teacher-students interactions and students’motivations in the classroom was carried out in a primary school in Scotland.The author illustrated the basic content of classrooms observed and the methods of collecting and analyzing the data.Then,it focused on the discussion of the data and related literacy.Finally,it drew the conclusion that the positive feedback,explanations for the reason of doing the task and enthusiastic actions could effectively motivate students to learn.