Instrumental Ensemble 1 - 4 is the Rock Ensemble Class.  
The Rock Ensemble is under the band name "Publik Edukation"

Rock Ensemble is a performing ensemble course in which students learn to rehearse and perform in a contemporary, popular music venue via a small band (typically 4-8 members).  Educational emphasis is placed on individual preparation, group communication and collaboration, creative exploration, music technology and stagecraft, small group leadership skills, and expanding students' knowledge of the contemporary music industry.  Styles studied and performed include any and all major popular genres (i.e., rock, pop, R&B) and their related sub-genres.  Students must possess previous vocal and/or instrumental experience related to popular genres (solo voice, acoustic and electric guitar, bass, drums, keyboards, etc.).