The purpose of this collective case study was to examine how four elementary music teachers (from different U.S. regions) integrated modern band into their curricula. Data included semi-structured interviews, videos, emails, and a researcher journal. Teachers integrated modern band to improve student "buy-in" and to gain instruments. All started modern band with older students in Grades 4 to 6 or 3 to 5, with some expanding to younger grades. Instruments were accumulated over time through various forms of funding, with repertoire selection coming primarily from students. All participants used approximation and multiple access points for making music when teaching modern band. Challenges were teachers' lack of knowledge and skills (playing modern band instruments and teaching rap and hip hop) and overcoming personal biases of popular music. Facilitating factors included access to training and resources and administrative funding and support. Implications include considerations for music teachers and music teacher educators.