Bands are the main working groups of Brightworks students. Each band is made up of 7-10 students with at most a 3-year age span between them, assisted by a staff collaborator. Students have frequent interaction with other bands and will sometimes choose to work on an Expression project with a member of a different band, but their home band and collaborator are their anchors within the school community.

Particularly during the Exploration phase of each arc, band members work closely together to expand their understanding of a topic and build the skills they will need for their projects. Social-emotional learning is also at its strongest within these small communities-within-a-community. Each band maintains a home bandspace within Brightworks that they build together and fill with evidence of their explorations, ideas, and projects.