“Student race/ethnicity is a categorical variable that indicates whether the student is Asian, Latino, Black, Other, or White, with White serving as the reference category. The sex of the student is measured in a binary variable that indicates whether the student is female (coded 1 if female and 0 if male). Age is a continuous variable representing the age, in years, of the student” (Cherng and Halpin, 2016, p. 3).
“A measure of the student’s academic achievement, which may shape his or her perceptions of teachers, is also included” (Cherng and Halpin, 2016, p. 3).