A person's physical appearance is his personal characteristic most obvious and most accessible to others in social interaction. Despite some social psychologists apparent disinterest in investigating physical attractiveness as an antecedent of liking, there has been a developing body of research which suggests that physical attractiveness is an important social cue used by others as a basis for social evaluation. If, as there appears, there is a physical attractiveness stereotype, it seems plausible to suggest that a child's personal characteristics may influence the way in which an adult evaluates his behaviour. There have been several studies that have looked at this issue as it might affect the classroom situation. These studies suggest that teachers may hold differential expectations for attractive and unattractive children.
Boyce, M. W. (1979). Physical Attractiveness - a Source of Teacher Bias?. Australian Journal of Teacher Education, 4(1). https://doi.org/10.14221/ajte.1979v4n1.5