Culture assumes various definitions in the educational literature.
A second definition highlights how students learn about various ethnic groups and strives for intergroup understanding. A third definition is found in research that examines the impact of culture on cognition, communication, motivation, language development and behavior. The explicit curriculum features a conscious inclusion of cultural knowledge as part of the lesson. The implicit curriculum is latent and informally expressed. The null curriculum finds culture untaught, reflecting a low value on such knowledge in the creation of curriculum and instruction.