The world was once made up of black and white nations. Skin color was an indication of a person's origin. This was most likely the scenario that prevailed at least a hundred years ago. Racism was endemic and very public around the world, but today racism is no longer as transparent, especially in the United States. For this reason, people must become more open and more sensitive to different attitudes of individuals. One area where racism should be examined is in classrooms. It is well known that people have preferences or cognitive preferences without even realizing it. A teacher therefore has an extremely powerful ability not only to give preferences to certain children, but also to treat students differently, with or without realizing it themselves. From the age of six, children are exposed to this and will likely imitate these behaviors in turn. Schools have widespread patterns of discrimination throughout the United States, but that doesn't have to be the case. There must be solutions for teachers and students to be more aware of discriminatory actions and at least limit these actions by becoming aware of them. What is needed is the knowledge that students have about ethnicity before they even start school. Student preferences, such as male or female teachers, ethnicity or background, have been little or never explored. Because of this, schools have little or no information about the biases students create before entering the classroom. (Ouzad, Page) This in turn creates a series of dilemmas. For example, a student with racist tendencies toward Asians is unlikely to change his beliefs until someone convinces him to think differently. This could happen very early in school or in the worst case... middle of article ......niela, Deisy das Graças de Souza and Romariz da Silva Barros. "Simple Successive Discrimination and Functional Class Formation in Preschool Children. Psychological Record 63.3 (2013): 525-544. Academic Research Premier. Internet. April 21, 2014. Erica Frankenberg, Genevieve Siegel-Hawley “Teacher Perceptions of school communities with different racial and socio-economic backgrounds for students.” The Civil Rights Project Proyecto Derechos Civiles (2012): Virgina CommonWealth University and Pennsylvania State University Internet. Lionel “Student Perceptions of Teacher Bias: Experimental Economics in Schools.” Psychological Report (2012): The Center for the Economics of Education. and the San Francisco Musicians Union » Journal of the Society for American Music (2007) Vol 1. April 29. 2014.