Bullying and sexual harassment are commonly experienced by secondary students, yet these behaviors are seldom targeted for intervention in high schools. Norms and Bystander Intervention Training (NAB IT!) is a program designed to address bullying and sexual harassment through promoting prosocial norms and helping behaviors among high school students. This mixed methods study examined students' receptivity to and perceptions of the NAB IT! social norms campaign. The campaign was delivered over seven weeks in a suburban high school (grades 9-12) in the northeastern United States. Twenty-eight students (60.7% female; 25.0% male; 7.2% genderqueer/gender non-conforming/transgender) participated in focus group discussions and provided quantitative ratings of the campaign. Participants were White (82.1%), Asian (7.1%), Multiracial (7.1%), and African American (3.6%). Students appreciated the prosocial messaging and believed that the campaign raised awareness of bullying and sexual harassment. Students reported that the campaign elicited greater self-reflection and discussion about potentially harmful behaviors. Nonetheless, some students doubted the credibility of the messages and noted incongruence between the messages and what they have observed in the school. Students indicated the need for more skills training for themselves and for faculty. [This paper was published in "Psychology in the Schools."]