Diversity is increasing within the United States, and higher education will likely play a key role in preparing people to function in this new environment. This study assessed the effectiveness of a semester-long psychology workplace diversity course at changing student levels of ethnocentrism and attitudes regarding gender roles; the disabled; gays, lesbians, and bisexuals (GLBs); racial minorities; and the elderly in the workplace. The results indicated that the course had a positive impact on the perceived equality of gender roles; improved student attitudes toward the disabled, racial minorities, and GLBs at work; and increased intercultural tolerance.