This study examines attitude changes among 30 college-bound high school seniors in California regarding prejudice and racism. Students were pre-tested using a 60-item Likert-style opinionnaire, received instruction about tolerance of differences and were post-tested immediately following the 3-week unit of instruction, which included reading and viewing multicultural material and performing exercises in critical thinking, esteem, and personal reflection. The findings of the study showed increased awareness and tolerance in the attitudes of the students. Student attitudes changed on a number of questions, as reflected on the post-test. A literature review and a copy of the opinionnaire are included as well as a data table showing post-test results for 10 items. (Contains 29 references.) (DB)