Teachers usually receive data about students at the beginning of the school year (test scores, past grades, family and health information, comments by previous teachers), which influence their expectations of students for achievement and behavior. Because of these expectations, the teacher tends to treat students differently. Students then react to the teacher differently. The students’ behavior and achievement reinforce the teacher’s expectations. Gradually, the students’ self-concepts, motivation, and levels of aspiration reflect these expectations. If continued throughout the year, the students’ performances will match or fulfill what the teacher expected or prophesied at the beginning of the year.