Bb Bass Clarinet. Essential Elements was the major breakthrough for beginning band methods in the '90s. Now Essential Elements 2000 will take band programs into the next millennium! EE2000 features:· A CD featuring a professional soloist in every Student Book 1 · Great performance music with planned first concert. · Even more great tunes, motivating students to practice and stay in band. · Special Rubank® Studies · Better pacing, sequencing and reinforcement. · Theory, history and creativity exercises integrated into each student book.