http://goo.gl/HSozjg
Discipline, including school corporal punishment, has been shown to be administered in unfair proportions to minority students and students with disabilities, according to this 2014 Civil Rights Data Collection study by the U.S. Department of Education Office for Civil Rights. The study shows that minority preschool children (four and five year olds) make up almost half of all out-of-school suspensions for preschoolers.
Additionally, this study by the Department of Human Development and Family Studies (HDFS) at the University of Missouri (a state where corporal punishment is legal) states that while only 14 percent of students have disabilities, students with disabilities account for 19 percent of the students receiving corporal punishment. Further, although African American students comprise just 17 percent of all students in the United States, they experience 36 percent of the instances of corporal punishment in the U.S.